Date: Fri, 31 Mar 2000 13:47:30 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Andrew Gallatin <gallatin@cs.duke.edu>, nsayer@kfu.com, freebsd-emulation@FreeBSD.ORG Subject: Re: VMware locks FreeBSD 4.0 solid Message-ID: <14564.61764.852285.849013@grasshopper.cs.duke.edu> In-Reply-To: <200003311728.JAA29464@apollo.backplane.com> References: <38E3FB31.3DD4D170@sftw.com> <14564.53252.962047.551231@grasshopper.cs.duke.edu> <200003311728.JAA29464@apollo.backplane.com>
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Matthew Dillon writes:
> The pagedaemon is stuck in biord, and that is definitely a problem.
> The question is: What mount point is that read coming off of?
>
> I suspect that the pagedaemon is trying to do a biord off the MFS
> filesystem and the MFS filesystem is locked up in vmwait. With the
> pagedaemon waiting for MFS and MFS waiting for free pages, the system
> winds up deadlocked.
Bingo! It was MFS!
> Can you try tracing out what mount that biord is operating on? And
(kgdb) p vp->v_mount->mnt_stat->f_mntonname
$6 = "/tmp", '\000' <repeats 75 times>
(kgdb) p vp->v_mount->mnt_stat->f_fstypename
$7 = "mfs", '\000' <repeats 12 times>
> also what is the MFS process doing (traceback)?
(kgdb) proc 0xd45fa100
(kgdb) bt
#0 mi_switch () at ../../kern/kern_synch.c:859
#1 0xc0156aa9 in tsleep (ident=0xc02ce678, priority=4,
wmesg=0xc0268369 "vmwait", timo=0) at ../../kern/kern_synch.c:468
#2 0xc01febb7 in vm_wait () at ../../vm/vm_page.c:880
#3 0xc01f6a5c in vm_fault (map=0xd45fdc40, vaddr=151269376,
fault_type=3 '\003', fault_flags=8) at ../../vm/vm_fault.c:364
#4 0xc023cc42 in trap_pfault (frame=0xd6d59d78, usermode=0, eva=151269376)
at ../../i386/i386/trap.c:797
#5 0xc023c85f in trap (frame={tf_fs = -873594864, tf_es = -1071120368,
tf_ds = -873594864, tf_edi = 151269376, tf_esi = -778469376,
tf_ebp = -690643472, tf_isp = -690643548, tf_ebx = 65536,
tf_edx = -1049541056, tf_ecx = 4096, tf_eax = 151285760, tf_trapno = 12,
tf_err = 2, tf_eip = -1071400839, tf_cs = 8, tf_eflags = 66054,
tf_esp = -873554632, tf_ss = -873554632}) at ../../i386/i386/trap.c:423
#6 0xc023b879 in generic_copyout ()
#7 0xc01ee844 in mfs_start (mp=0xc17fea00, flags=0, p=0xd45fa100)
at ../../ufs/mfs/mfs_vfsops.c:344
#8 0xc017f131 in mount (p=0xd45fa100, uap=0xd6d59f80)
at ../../kern/vfs_syscalls.c:344
<..>
I'll try running w/o MFS & let you know what happens.
Drew
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Andrew Gallatin, Sr Systems Programmer http://www.cs.duke.edu/~gallatin
Duke University Email: gallatin@cs.duke.edu
Department of Computer Science Phone: (919) 660-6590
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