Date: Tue, 15 Dec 2015 15:52:12 +0100 From: Bengt Ahlgren <bengta@sics.se> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS hang in zfs_freebsd_rename Message-ID: <uh7vb7zhihv.fsf@P142s.sics.se> In-Reply-To: <567022FB.1010508@multiplay.co.uk> (Steven Hartland's message of "Tue, 15 Dec 2015 14:26:03 %2B0000") References: <uh7a8pbj2mo.fsf@P142s.sics.se> <567022FB.1010508@multiplay.co.uk>
next in thread | previous in thread | raw e-mail | index | archive | help
Yes, that is on the todo list... So this is likely fixed then in 10.x? Bengt Steven Hartland <killing@multiplay.co.uk> writes: > Not a surprise in 9.x unfortunately, try upgrading to 10.x > > On 15/12/2015 12:51, Bengt Ahlgren wrote: >> We have a server running 9.3-REL which currenly has two quite large zfs >> pools: >> >> NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT >> p1 18.1T 10.7T 7.38T 59% 1.00x ONLINE - >> p2 43.5T 29.1T 14.4T 66% 1.00x ONLINE - >> >> It has been running without any issues for some time now. Once, just >> now, processes are getting stuck and impossible to kill on accessing a >> particular directory in the p2 pool. That pool is a 2x6 disk raidz2. >> >> One process is stuck in zfs_freebsd_rename, and other processes >> accessing that particular directory also get stuck. The system is now >> almost completely idle. >> >> Output from kgdb on the running system for that first process: >> >> Thread 651 (Thread 102157): >> #0 sched_switch (td=0xfffffe0b14059920, newtd=0xfffffe001633e920, flags=<value optimized out>) >> at /usr/src/sys/kern/sched_ule.c:1904 >> #1 0xffffffff808f4604 in mi_switch (flags=260, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:485 >> #2 0xffffffff809308e2 in sleepq_wait (wchan=0xfffffe0135b60488, >> pri=96) at /usr/src/sys/kern/subr_sleepqueue.c:618 >> #3 0xffffffff808cf922 in __lockmgr_args (lk=0xfffffe0135b60488, flags=524544, ilk=0xfffffe0135b604b8, >> wmesg=<value optimized out>, pri=<value optimized out>, timo=<value optimized out>, >> file=0xffffffff80f0d782 "/usr/src/sys/kern/vfs_subr.c", line=2337) at /usr/src/sys/kern/kern_lock.c:221 >> #4 0xffffffff80977369 in vop_stdlock (ap=<value optimized out>) at lockmgr.h:97 >> #5 0xffffffff80dd4a04 in VOP_LOCK1_APV (vop=0xffffffff813e8160, a=0xffffffa07f935520) at vnode_if.c:2052 >> #6 0xffffffff80998c17 in _vn_lock (vp=0xfffffe0135b603f0, flags=524288, >> file=0xffffffff80f0d782 "/usr/src/sys/kern/vfs_subr.c", line=2337) at vnode_if.h:859 >> #7 0xffffffff8098b621 in vputx (vp=0xfffffe0135b603f0, func=1) at /usr/src/sys/kern/vfs_subr.c:2337 >> #8 0xffffffff81ac7955 in zfs_rename_unlock (zlpp=0xffffffa07f9356b8) >> at /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c:3609 >> #9 0xffffffff81ac8c72 in zfs_freebsd_rename (ap=<value optimized out>) >> at /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c:4039 >> #10 0xffffffff80dd4f04 in VOP_RENAME_APV (vop=0xffffffff81b47d40, a=0xffffffa07f9358e0) at vnode_if.c:1522 >> #11 0xffffffff80996bbd in kern_renameat (td=<value optimized out>, oldfd=<value optimized out>, >> old=<value optimized out>, newfd=-100, new=0x1826a9af00 <Error reading address 0x1826a9af00: Bad address>, >> pathseg=<value optimized out>) at vnode_if.h:636 >> #12 0xffffffff80cd228a in amd64_syscall (td=0xfffffe0b14059920, traced=0) at subr_syscall.c:135 >> #13 0xffffffff80cbc907 in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:396 >> ---Type <return> to continue, or q <return> to quit--- >> #14 0x0000000800cc1acc in ?? () >> Previous frame inner to this frame (corrupt stack?) >> >> Full procstat -kk -a and kgdb "thread apply all bt" can be found here: >> >> https://www.sics.se/~bengta/ZFS-hang/ >> >> I don't know how to produce "alltrace in ddb" as the instructions in the >> wiki says. It runs the GENERIC kernel, so perhaps it isn't possible? >> >> I checked "camcontrol tags" for all the disks in the pool - all have >> zeroes for dev_active, devq_queued and held. >> >> Is there anything else I can check while the machine is up? I however >> need to restart it pretty soon. >> >> Bengt >> _______________________________________________ >> freebsd-fs@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?uh7vb7zhihv.fsf>