Date: Thu, 11 Dec 2008 23:32:27 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: Randy Bush <randy@psg.com> Cc: FreeBSD Current <current@freebsd.org> Subject: Re: panic: sleeping thread & bufwrite: buffer is not busy??? Message-ID: <20081211213227.GX2038@deviant.kiev.zoral.com.ua> In-Reply-To: <4940A685.7040608@psg.com> References: <4940A685.7040608@psg.com>
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[-- Attachment #1 --] On Thu, Dec 11, 2008 at 02:35:01PM +0900, Randy Bush wrote: > i386 soekris 5501 > current as of Dec 11 00:27 gmt > > Unread portion of the kernel message buffer: > Sleeping thread (tid 100054, pid 646) owns a non-sleepable lock > panic: sleeping thread > panic: bufwrite: buffer is not busy??? > Uptime: 2m1s > Physical memory: 503 MB > > #0 doadump () at pcpu.h:246 > #1 0xc0571f33 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:420 > #2 0xc05720f7 in panic (fmt=Variable "fmt" is not available.) > at /usr/src/sys/kern/kern_shutdown.c:576 > #3 0xc06fc75c in ffs_bufwrite (bp=0xc2937e20) > at /usr/src/sys/ufs/ffs/ffs_vfsops.c:1786 > #4 0xc05c7250 in vfs_bio_awrite (bp=0xc2937e20) at buf.h:385 > #5 0xc05cfee0 in vop_stdfsync (ap=0xc2a89b34) > at /usr/src/sys/kern/vfs_default.c:479 > #6 0xc0520ad3 in devfs_fsync (ap=0xc2a89b34) > at /usr/src/sys/fs/devfs/devfs_vnops.c:485 > #7 0xc074e50e in VOP_FSYNC_APV (vop=0xc07cc800, a=0xc2a89b34) > at vnode_if.c:1007 > #8 0xc06fd0a2 in ffs_sync (mp=0xc2e33c80, waitfor=2, td=0xc2c28480) > at vnode_if.h:529 > #9 0xc05e0803 in sync (td=0xc2c28480, uap=0x0) > at /usr/src/sys/kern/vfs_syscalls.c:149 > #10 0xc0571ad2 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:312 > #11 0xc05720f7 in panic (fmt=Variable "fmt" is not available.) > at /usr/src/sys/kern/kern_shutdown.c:576 > #12 0xc059ec81 in propagate_priority (td=0xc2e696c0) > at /usr/src/sys/kern/subr_turnstile.c:222 > #13 0xc059f551 in turnstile_wait (ts=0xc2c0ee10, owner=0xc2e696c0, > queue=Variable "queue" is not available.) > at /usr/src/sys/kern/subr_turnstile.c:738 > #14 0xc0570c73 in _rw_wlock_hard (rw=0xc2cdcd80, tid=3267527808, > file=0x0, line=0) > at /usr/src/sys/kern/kern_rwlock.c:705 > #15 0xc06bdcb6 in in6_mtutimo (rock=0xc2cdcd00) > at /usr/src/sys/netinet6/in6_rmx.c:437 > #16 0xc0580f77 in softclock (arg=0xc07ffbe0) > at /usr/src/sys/kern/kern_timeout.c:398 > #17 0xc055790a in intr_event_execute_handlers (p=0xc2c257ec, ie=0xc2c22400) > at /usr/src/sys/kern/kern_intr.c:1134 > #18 0xc0558933 in ithread_loop (arg=0xc2c07ba0) > at /usr/src/sys/kern/kern_intr.c:1147 > #19 0xc0555cb6 in fork_exit (callout=0xc05588d0 <ithread_loop>, > arg=0xc2c07ba0, frame=0xc2a89d38) at /usr/src/sys/kern/kern_fork.c:821 > #20 0xc0730a50 in fork_trampoline () at > /usr/src/sys/i386/i386/exception.s:270 Do you have sysctl kern.sync_on_panic=1 ? The trace looks like some problem in ipv6, panic, attempt to sync ufs, and second panic due to locking actually turned off by the first panic. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAklBht0ACgkQC3+MBN1Mb4isXwCg9Iq15ZI3Y7OMLPHJVDexsCFd JS0AoMF0JHqcw+doCNPVJhf7ZgNU1lgn =PcPS -----END PGP SIGNATURE-----
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