Date: Thu, 18 Dec 2014 21:35:25 -0500 (EST) From: Rick Macklem <rmacklem@uoguelph.ca> To: =?utf-8?B?TG/Dr2M=?= Blot <loic.blot@unix-experience.fr> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS vnode lock deadlock in zfs_fhtovp was: High Kernel Load with nfsv4 Message-ID: <1280817381.630445.1418956525242.JavaMail.root@uoguelph.ca> In-Reply-To: <0eaadfe31ac4b8bbdeaf0baff696dada@mail.unix-experience.fr>
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Loic Blot wrote: > Hi rick, > i tried to start a LXC container on Debian Squeeze from my freebsd > ZFS+NFSv4 server and i also have a deadlock on nfsd > (vfs.lookup_shared=0). Deadlock procs each time i launch a squeeze > container, it seems (3 tries, 3 fails). > > 921 - D 0:00.02 nfsd: server (nfsd) > > Here is the procstat -kk > Ok, I took a closer look at this and I think you have found a bug in the NFSv4 server's file locking code. If I am correct, this will only happen if you have the vfs.nfsd.enable_locallocks=1. Please try setting: vfs.nfsd.enable_locallocks=0 (which I thought was the default setting?) This only needs to be non-zero if non-nfsd threads running in the NFS server need to see the locks being set by NFS clients. (If your application does require non-nfsd threads running in the NFS server to see the file locks, you'll have to wait until I come up with a patch for this, which could be a week or more.) In case you are curious, when vfs.nfsd.enable_locallocks=1, the server vop_unlock()s/vop_lock()s the vnode around a VOP_ADVLOCK() call. Unfortunately, this introduces a LOR with the nfsv4_lock() which is held at this time. I think this resulted in this deadlock. To fix it, I will have to delay the vn_lock() call until after the nfsv4_lock() is released. This probably hasn't been reported before, because most don't set vfs.nfsd.enable_locallocks=1. Thanks for reporting this and sorry I didn't spot this sooner, rick > PID TID COMM TDNAME KSTACK > 921 100538 nfsd nfsd: master mi_switch+0xe1 > sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0xc9e > vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 > nfsvno_advlock+0x119 nfsrv_dolocal+0x84 nfsrv_lockctrl+0x14ad > nfsrvd_locku+0x283 nfsrvd_dorpc+0xec6 nfssvc_program+0x554 > svc_run_internal+0xc77 svc_run+0x1de nfsrvd_nfsd+0x1ca > nfssvc_nfsd+0x107 sys_nfssvc+0x9c This is the bad one, which is trying to get a vnode lock while holding the nfsv4_lock(), which is a LOR (the code should always acquire the nfsv4_lock() after having the vnode locked). Since another thread has the vnode locked and is trying to acquire the nfsv4_lock()--> deadlock. > 921 100572 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100573 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100574 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100575 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100576 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100577 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100578 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100579 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100580 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100581 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100582 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100583 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100584 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100585 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100586 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100587 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100588 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100589 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100590 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100591 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100592 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100593 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100594 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100595 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100596 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100597 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100598 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100599 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100600 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100601 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100602 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100603 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100604 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100605 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100606 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100607 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100608 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100609 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100610 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100611 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100612 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100613 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100614 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100615 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100616 nfsd nfsd: service mi_switch+0xe1 > sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > nfsrv_getlockfile+0x179 nfsrv_lockctrl+0x21f nfsrvd_lock+0x5b1 > nfsrvd_dorpc+0xec6 nfssvc_program+0x554 svc_run_internal+0xc77 > svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > 921 100617 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100618 nfsd nfsd: service mi_switch+0xe1 > sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > 921 100619 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100620 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100621 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100622 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100623 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100624 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100625 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100626 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100627 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100628 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100629 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100630 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100631 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100632 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100633 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100634 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100635 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100636 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100637 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100638 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100639 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100640 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100641 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100642 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100643 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100644 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100645 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100646 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100647 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100648 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100649 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100650 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100651 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100652 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100653 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100654 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100655 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100656 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100657 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100658 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100659 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100660 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100661 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100662 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100663 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100664 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100665 nfsd nfsd: service mi_switch+0xe1 > sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > fork_trampoline+0xe > 921 100666 nfsd nfsd: service mi_switch+0xe1 > sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > nfsrv_setclient+0xbd nfsrvd_setclientid+0x3c8 nfsrvd_dorpc+0xc76 > nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > fork_exit+0x9a fork_trampoline+0xe > > > Regards, > > Loïc Blot, > UNIX Systems, Network and Security Engineer > http://www.unix-experience.fr > > 15 décembre 2014 15:18 "Rick Macklem" <rmacklem@uoguelph.ca> a écrit: > > Loic Blot wrote: > > > >> For more informations, here is procstat -kk on nfsd, if you need > >> more > >> hot datas, tell me. > >> > >> Regards, PID TID COMM TDNAME KSTACK > >> 918 100529 nfsd nfsd: master mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_run+0x1de > >> nfsrvd_nfsd+0x1ca nfssvc_nfsd+0x107 sys_nfssvc+0x9c > >> amd64_syscall+0x351 > > > > Well, most of the threads are stuck like this one, waiting for a > > vnode > > lock in ZFS. All of them appear to be in zfs_fhtovp(). > > I`m not a ZFS guy, so I can`t help much. I`ll try changing the > > subject line > > to include ZFS vnode lock, so maybe the ZFS guys will take a look. > > > > The only thing I`ve seen suggested is trying: > > sysctl vfs.lookup_shared=0 > > to disable shared vop_lookup()s. Apparently zfs_lookup() doesn`t > > obey the vnode locking rules for lookup and rename, according to > > the posting I saw. > > > > I`ve added a couple of comments about the other threads below, but > > they are all either waiting for an RPC request or waiting for the > > threads stuck on the ZFS vnode lock to complete. > > > > rick > > > >> 918 100564 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > >> svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe > > > > Fyi, this thread is just waiting for an RPC to arrive. (Normal) > > > >> 918 100565 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > >> svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe > >> 918 100566 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > >> svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe > >> 918 100567 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > >> svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe > >> 918 100568 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > >> svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe > >> 918 100569 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > >> svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe > >> 918 100570 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a > >> svc_run_internal+0x87e svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe > >> 918 100571 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100572 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrv_setclient+0xbd nfsrvd_setclientid+0x3c8 nfsrvd_dorpc+0xc76 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > > > > This one (and a few others) are waiting for the nfsv4_lock. This > > happens > > because other threads are stuck with RPCs in progress. (ie. The > > ones > > waiting on the vnode lock in zfs_fhtovp().) > > For these, the RPC needs to lock out other threads to do the > > operation, > > so it waits for the nfsv4_lock() which can exclusively lock the > > NFSv4 > > data structures once all other nfsd threads complete their RPCs in > > progress. > > > >> 918 100573 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > > > > Same as above. > > > >> 918 100574 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100575 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100576 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100577 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100578 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100579 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100580 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100581 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100582 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100583 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100584 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100585 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100586 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100587 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100588 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100589 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100590 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100591 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100592 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100593 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100594 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100595 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100596 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100597 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100598 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100599 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100600 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100601 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100602 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100603 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100604 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100605 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100606 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100607 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > > > > Lots more waiting for the ZFS vnode lock in zfs_fhtovp(). > > > >> 918 100608 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrv_getlockfile+0x179 nfsrv_lockctrl+0x21f nfsrvd_lock+0x5b1 > >> nfsrvd_dorpc+0xec6 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100609 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100610 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0xc9e > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 > >> nfsvno_advlock+0x119 nfsrv_dolocal+0x84 nfsrv_lockctrl+0x14ad > >> nfsrvd_locku+0x283 nfsrvd_dorpc+0xec6 nfssvc_program+0x554 > >> svc_run_internal+0xc77 svc_thread_start+0xb fork_exit+0x9a > >> fork_trampoline+0xe Ouch! I missed this one when I looked at it, so I missed the critical line that showed the race. Fortunately you posted a shorter one. This would the same race as above. Hopefully you can run with: vfs.nfsd.enable_locallocks=0 rick > >> 918 100611 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100612 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100613 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100614 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100615 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100616 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100617 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100618 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100619 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100620 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100621 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100622 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100623 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a _sleep+0x287 nfsmsleep+0x66 nfsv4_lock+0x9b > >> nfsrvd_dorpc+0x316 nfssvc_program+0x554 svc_run_internal+0xc77 > >> svc_thread_start+0xb fork_exit+0x9a fork_trampoline+0xe > >> 918 100624 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100625 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100626 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100627 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100628 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100629 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100630 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100631 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100632 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100633 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100634 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100635 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100636 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100637 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100638 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100639 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100640 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100641 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100642 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100643 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100644 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100645 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100646 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100647 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100648 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100649 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100650 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100651 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100652 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100653 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100654 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100655 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100656 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100657 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> 918 100658 nfsd nfsd: service mi_switch+0xe1 > >> sleepq_wait+0x3a sleeplk+0x15d __lockmgr_args+0x902 > >> vop_stdlock+0x3c VOP_LOCK1_APV+0xab _vn_lock+0x43 zfs_fhtovp+0x38d > >> nfsvno_fhtovp+0x7c nfsd_fhtovp+0xc8 nfsrvd_dorpc+0x917 > >> nfssvc_program+0x554 svc_run_internal+0xc77 svc_thread_start+0xb > >> fork_exit+0x9a fork_trampoline+0xe > >> > >> Loïc Blot, > >> UNIX Systems, Network and Security Engineer > >> http://www.unix-experience.fr > >> > >> 15 décembre 2014 13:29 "Loïc Blot" <loic.blot@unix-experience.fr> > >> a > >> écrit: > >>> Hmmm... > >>> now i'm experiencing a deadlock. > >>> > >>> 0 918 915 0 21 0 12352 3372 zfs D - 1:48.64 nfsd: server (nfsd) > >>> > >>> the only issue was to reboot the server, but after rebooting > >>> deadlock arrives a second time when i > >>> start my jails over NFS. > >>> > >>> Regards, > >>> > >>> Loïc Blot, > >>> UNIX Systems, Network and Security Engineer > >>> http://www.unix-experience.fr > >>> > >>> 15 décembre 2014 10:07 "Loïc Blot" <loic.blot@unix-experience.fr> > >>> a > >>> écrit: > >>> > >>> Hi Rick, > >>> after talking with my N+1, NFSv4 is required on our > >>> infrastructure. > >>> I tried to upgrade NFSv4+ZFS > >>> server from 9.3 to 10.1, i hope this will resolve some issues... > >>> > >>> Regards, > >>> > >>> Loïc Blot, > >>> UNIX Systems, Network and Security Engineer > >>> http://www.unix-experience.fr > >>> > >>> 10 décembre 2014 15:36 "Loïc Blot" <loic.blot@unix-experience.fr> > >>> a > >>> écrit: > >>> > >>> Hi Rick, > >>> thanks for your suggestion. > >>> For my locking bug, rpc.lockd is stucked in rpcrecv state on the > >>> server. kill -9 doesn't affect the > >>> process, it's blocked.... (State: Ds) > >>> > >>> for the performances > >>> > >>> NFSv3: 60Mbps > >>> NFSv4: 45Mbps > >>> Regards, > >>> > >>> Loïc Blot, > >>> UNIX Systems, Network and Security Engineer > >>> http://www.unix-experience.fr > >>> > >>> 10 décembre 2014 13:56 "Rick Macklem" <rmacklem@uoguelph.ca> a > >>> écrit: > >>> > >>>> Loic Blot wrote: > >>>> > >>>>> Hi Rick, > >>>>> I'm trying NFSv3. > >>>>> Some jails are starting very well but now i have an issue with > >>>>> lockd > >>>>> after some minutes: > >>>>> > >>>>> nfs server 10.10.X.8:/jails: lockd not responding > >>>>> nfs server 10.10.X.8:/jails lockd is alive again > >>>>> > >>>>> I look at mbuf, but i seems there is no problem. > >>>> > >>>> Well, if you need locks to be visible across multiple clients, > >>>> then > >>>> I'm afraid you are stuck with using NFSv4 and the performance > >>>> you > >>>> get > >>>> from it. (There is no way to do file handle affinity for NFSv4 > >>>> because > >>>> the read and write ops are buried in the compound RPC and not > >>>> easily > >>>> recognized.) > >>>> > >>>> If the locks don't need to be visible across multiple clients, > >>>> I'd > >>>> suggest trying the "nolockd" option with nfsv3. > >>>> > >>>>> Here is my rc.conf on server: > >>>>> > >>>>> nfs_server_enable="YES" > >>>>> nfsv4_server_enable="YES" > >>>>> nfsuserd_enable="YES" > >>>>> nfsd_server_flags="-u -t -n 256" > >>>>> mountd_enable="YES" > >>>>> mountd_flags="-r" > >>>>> nfsuserd_flags="-usertimeout 0 -force 20" > >>>>> rpcbind_enable="YES" > >>>>> rpc_lockd_enable="YES" > >>>>> rpc_statd_enable="YES" > >>>>> > >>>>> Here is the client: > >>>>> > >>>>> nfsuserd_enable="YES" > >>>>> nfsuserd_flags="-usertimeout 0 -force 20" > >>>>> nfscbd_enable="YES" > >>>>> rpc_lockd_enable="YES" > >>>>> rpc_statd_enable="YES" > >>>>> > >>>>> Have you got an idea ? > >>>>> > >>>>> Regards, > >>>>> > >>>>> Loïc Blot, > >>>>> UNIX Systems, Network and Security Engineer > >>>>> http://www.unix-experience.fr > >>>>> > >>>>> 9 décembre 2014 04:31 "Rick Macklem" <rmacklem@uoguelph.ca> a > >>>>> écrit: > >>>>>> Loic Blot wrote: > >>>>>> > >>>>>>> Hi rick, > >>>>>>> > >>>>>>> I waited 3 hours (no lag at jail launch) and now I do: sysrc > >>>>>>> memcached_flags="-v -m 512" > >>>>>>> Command was very very slow... > >>>>>>> > >>>>>>> Here is a dd over NFS: > >>>>>>> > >>>>>>> 601062912 bytes transferred in 21.060679 secs (28539579 > >>>>>>> bytes/sec) > >>>>>> > >>>>>> Can you try the same read using an NFSv3 mount? > >>>>>> (If it runs much faster, you have probably been bitten by the > >>>>>> ZFS > >>>>>> "sequential vs random" read heuristic which I've been told > >>>>>> things > >>>>>> NFS is doing "random" reads without file handle affinity. File > >>>>>> handle affinity is very hard to do for NFSv4, so it isn't > >>>>>> done.) > >>>> > >>>> I was actually suggesting that you try the "dd" over nfsv3 to > >>>> see > >>>> how > >>>> the performance compared with nfsv4. If you do that, please post > >>>> the > >>>> comparable results. > >>>> > >>>> Someday I would like to try and get ZFS's sequential vs random > >>>> read > >>>> heuristic modified and any info on what difference in > >>>> performance > >>>> that > >>>> might make for NFS would be useful. > >>>> > >>>> rick > >>>> > >>>>>> rick > >>>>>> > >>>>>>> This is quite slow... > >>>>>>> > >>>>>>> You can found some nfsstat below (command isn't finished yet) > >>>>>>> > >>>>>>> nfsstat -c -w 1 > >>>>>>> > >>>>>>> GtAttr Lookup Rdlink Read Write Rename Access Rddir > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 4 0 0 0 0 0 16 0 > >>>>>>> 2 0 0 0 0 0 17 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 4 0 0 0 0 4 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 4 0 0 0 0 0 3 0 > >>>>>>> 0 0 0 0 0 0 3 0 > >>>>>>> 37 10 0 8 0 0 14 1 > >>>>>>> 18 16 0 4 1 2 4 0 > >>>>>>> 78 91 0 82 6 12 30 0 > >>>>>>> 19 18 0 2 2 4 2 0 > >>>>>>> 0 0 0 0 2 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> GtAttr Lookup Rdlink Read Write Rename Access Rddir > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 1 0 0 0 0 1 0 > >>>>>>> 4 6 0 0 6 0 3 0 > >>>>>>> 2 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 1 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 1 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 6 108 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> GtAttr Lookup Rdlink Read Write Rename Access Rddir > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 98 54 0 86 11 0 25 0 > >>>>>>> 36 24 0 39 25 0 10 1 > >>>>>>> 67 8 0 63 63 0 41 0 > >>>>>>> 34 0 0 35 34 0 0 0 > >>>>>>> 75 0 0 75 77 0 0 0 > >>>>>>> 34 0 0 35 35 0 0 0 > >>>>>>> 75 0 0 74 76 0 0 0 > >>>>>>> 33 0 0 34 33 0 0 0 > >>>>>>> 0 0 0 0 5 0 0 0 > >>>>>>> 0 0 0 0 0 0 6 0 > >>>>>>> 11 0 0 0 0 0 11 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 17 0 0 0 0 1 0 > >>>>>>> GtAttr Lookup Rdlink Read Write Rename Access Rddir > >>>>>>> 4 5 0 0 0 0 12 0 > >>>>>>> 2 0 0 0 0 0 26 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 4 0 0 0 0 4 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 4 0 0 0 0 0 2 0 > >>>>>>> 2 0 0 0 0 0 24 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> GtAttr Lookup Rdlink Read Write Rename Access Rddir > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 4 0 0 0 0 0 7 0 > >>>>>>> 2 1 0 0 0 0 1 0 > >>>>>>> 0 0 0 0 2 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 6 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 4 6 0 0 0 0 3 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 2 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> GtAttr Lookup Rdlink Read Write Rename Access Rddir > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 4 71 0 0 0 0 0 0 > >>>>>>> 0 1 0 0 0 0 0 0 > >>>>>>> 2 36 0 0 0 0 1 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 1 0 0 0 0 0 1 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 79 6 0 79 79 0 2 0 > >>>>>>> 25 0 0 25 26 0 6 0 > >>>>>>> 43 18 0 39 46 0 23 0 > >>>>>>> 36 0 0 36 36 0 31 0 > >>>>>>> 68 1 0 66 68 0 0 0 > >>>>>>> GtAttr Lookup Rdlink Read Write Rename Access Rddir > >>>>>>> 36 0 0 36 36 0 0 0 > >>>>>>> 48 0 0 48 49 0 0 0 > >>>>>>> 20 0 0 20 20 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 3 14 0 1 0 0 11 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 0 4 0 0 0 0 4 0 > >>>>>>> 0 0 0 0 0 0 0 0 > >>>>>>> 4 22 0 0 0 0 16 0 > >>>>>>> 2 0 0 0 0 0 23 0 > >>>>>>> > >>>>>>> Regards, > >>>>>>> > >>>>>>> Loïc Blot, > >>>>>>> UNIX Systems, Network and Security Engineer > >>>>>>> http://www.unix-experience.fr > >>>>>>> > >>>>>>> 8 décembre 2014 09:36 "Loïc Blot" > >>>>>>> <loic.blot@unix-experience.fr> a > >>>>>>> écrit: > >>>>>>>> Hi Rick, > >>>>>>>> I stopped the jails this week-end and started it this > >>>>>>>> morning, > >>>>>>>> i'll > >>>>>>>> give you some stats this week. > >>>>>>>> > >>>>>>>> Here is my nfsstat -m output (with your rsize/wsize tweaks) > >>> > >>> > >> > > nfsv4,tcp,resvport,hard,cto,sec=sys,acdirmin=3,acdirmax=60,acregmin=5,acregmax=60,nametimeo=60,negna > >>> > >>>>>>>> > >>> > >>> > >> > > etimeo=60,rsize=32768,wsize=32768,readdirsize=32768,readahead=1,wcommitsize=773136,timeout=120,retra > >>> > >>> s=2147483647 > >>> > >>> On server side my disks are on a raid controller which show a > >>> 512b > >>> volume and write performances > >>> are very honest (dd if=/dev/zero of=/jails/test.dd bs=4096 > >>> count=100000000 => 450MBps) > >>> > >>> Regards, > >>> > >>> Loïc Blot, > >>> UNIX Systems, Network and Security Engineer > >>> http://www.unix-experience.fr > >>> > >>> 5 décembre 2014 15:14 "Rick Macklem" <rmacklem@uoguelph.ca> a > >>> écrit: > >>> > >>>> Loic Blot wrote: > >>>> > >>>>> Hi, > >>>>> i'm trying to create a virtualisation environment based on > >>>>> jails. > >>>>> Those jails are stored under a big ZFS pool on a FreeBSD 9.3 > >>>>> which > >>>>> export a NFSv4 volume. This NFSv4 volume was mounted on a big > >>>>> hypervisor (2 Xeon E5v3 + 128GB memory and 8 ports (but only 1 > >>>>> was > >>>>> used at this time). > >>>>> > >>>>> The problem is simple, my hypervisors runs 6 jails (used 1% cpu > >>>>> and > >>>>> 10GB RAM approximatively and less than 1MB bandwidth) and works > >>>>> fine at start but the system slows down and after 2-3 days > >>>>> become > >>>>> unusable. When i look at top command i see 80-100% on system > >>>>> and > >>>>> commands are very very slow. Many process are tagged with > >>>>> nfs_cl*. > >>>> > >>>> To be honest, I would expect the slowness to be because of slow > >>>> response > >>>> from the NFSv4 server, but if you do: > >>>> # ps axHl > >>>> on a client when it is slow and post that, it would give us some > >>>> more > >>>> information on where the client side processes are sitting. > >>>> If you also do something like: > >>>> # nfsstat -c -w 1 > >>>> and let it run for a while, that should show you how many RPCs > >>>> are > >>>> being done and which ones. > >>>> > >>>> # nfsstat -m > >>>> will show you what your mount is actually using. > >>>> The only mount option I can suggest trying is > >>>> "rsize=32768,wsize=32768", > >>>> since some network environments have difficulties with 64K. > >>>> > >>>> There are a few things you can try on the NFSv4 server side, if > >>>> it > >>>> appears > >>>> that the clients are generating a large RPC load. > >>>> - disabling the DRC cache for TCP by setting vfs.nfsd.cachetcp=0 > >>>> - If the server is seeing a large write RPC load, then > >>>> "sync=disabled" > >>>> might help, although it does run a risk of data loss when the > >>>> server > >>>> crashes. > >>>> Then there are a couple of other ZFS related things (I'm not a > >>>> ZFS > >>>> guy, > >>>> but these have shown up on the mailing lists). > >>>> - make sure your volumes are 4K aligned and ashift=12 (in case a > >>>> drive > >>>> that uses 4K sectors is pretending to be 512byte sectored) > >>>> - never run over 70-80% full if write performance is an issue > >>>> - use a zil on an SSD with good write performance > >>>> > >>>> The only NFSv4 thing I can tell you is that it is known that > >>>> ZFS's > >>>> algorithm for determining sequential vs random I/O fails for > >>>> NFSv4 > >>>> during writing and this can be a performance hit. The only > >>>> workaround > >>>> is to use NFSv3 mounts, since file handle affinity apparently > >>>> fixes > >>>> the problem and this is only done for NFSv3. > >>>> > >>>> rick > >>>> > >>>>> I saw that there are TSO issues with igb then i'm trying to > >>>>> disable > >>>>> it with sysctl but the situation wasn't solved. > >>>>> > >>>>> Someone has got ideas ? I can give you more informations if you > >>>>> need. > >>>>> > >>>>> Thanks in advance. > >>>>> Regards, > >>>>> > >>>>> Loïc Blot, > >>>>> UNIX Systems, Network and Security Engineer > >>>>> http://www.unix-experience.fr > >>>>> _______________________________________________ > >>>>> freebsd-fs@freebsd.org mailing list > >>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-fs > >>>>> To unsubscribe, send any mail to > >>>>> "freebsd-fs-unsubscribe@freebsd.org" > >>> > >>> _______________________________________________ > >>> freebsd-fs@freebsd.org mailing list > >>> http://lists.freebsd.org/mailman/listinfo/freebsd-fs > >>> To unsubscribe, send any mail to > >>> "freebsd-fs-unsubscribe@freebsd.org" > >>> > >>> _______________________________________________ > >>> freebsd-fs@freebsd.org mailing list > >>> http://lists.freebsd.org/mailman/listinfo/freebsd-fs > >>> To unsubscribe, send any mail to > >>> "freebsd-fs-unsubscribe@freebsd.org" > >>> > >>> _______________________________________________ > >>> freebsd-fs@freebsd.org mailing list > >>> http://lists.freebsd.org/mailman/listinfo/freebsd-fs > >>> To unsubscribe, send any mail to > >>> "freebsd-fs-unsubscribe@freebsd.org" > >>> _______________________________________________ > >>> freebsd-fs@freebsd.org mailing list > >>> http://lists.freebsd.org/mailman/listinfo/freebsd-fs > >>> To unsubscribe, send any mail to > >>> "freebsd-fs-unsubscribe@freebsd.org" >home | help
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