Re: panic: softdep_lock: locking against myself

On Tue, 2 Sep 2003, Christian Brueffer wrote:

> Hi,
>
> got a panic with a kernel from sources around September 1st, 8pm.
>
> Dump and debugging kernel available for further debugging.
> cg_at_ got the same panic on his machine.
>

This is probably my fault.  I will look into it tonight.  Until then you
could backup to sources from aug 28th or so to avoid these changes.

Thanks!
Jeff

>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; lapic.id = 00000000
> fault virtual address   = 0xdeadc1e6
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc0306f82
> stack pointer           = 0x10:0xdb832528
> frame pointer           = 0x10:0xdb832558
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> 			processor eflags        = interrupt enabled, resume, IOPL = 0
> 			current process         = 42532 (as)
> trap number             = 12
> panic: page fault
> cpuid = 0; lapic.id = 00000000
> boot() called on cpu#0
>
> syncing disks, buffers remaining... panic: softdep_lock: locking against myself
> cpuid = 0; lapic.id = 00000000
> boot() called on cpu#0
> Uptime: 5h39m29s
> Dumping 511 MB
>  16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 368 384 400 416 432 448 4
>  64 480 496
>  ---
> #0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
> 	240             dumping++;
> (kgdb) bt
> #0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
> #1  0xc0212d70 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:372
> #2  0xc0213176 in panic (fmt=0xc03bf620 "softdep_lock: locking against myself")
> 	     at /usr/src/sys/kern/kern_shutdown.c:550
> #3  0xc02fde43 in acquire_lock (lk=0x0) at /usr/src/sys/ufs/ffs/ffs_softdep.c:258
> #4  0xc0303152 in initiate_write_filepage (pagedep=0xc4f9d8c0, bp=0xce661980)
> 	         at /usr/src/sys/ufs/ffs/ffs_softdep.c:3535
> #5  0xc0302fac in softdep_disk_io_initiation (bp=0xce661980) at /usr/src/sys/ufs/ffs/ffs_softdep.c:3452
> #6  0xc01c0b14 in spec_xstrategy (vp=0xc420adb0, bp=0xce661980) at /usr/src/sys/sys/buf.h:416
> #7  0xc01c0cf2 in spec_specstrategy (ap=0xdb832258) at /usr/src/sys/fs/specfs/spec_vnops.c:529
> #8  0xc01bfc88 in spec_vnoperate (ap=0x0) at /usr/src/sys/fs/specfs/spec_vnops.c:122
> #9  0xc0318380 in ufs_strategy (ap=0x0) at vnode_if.h:1141
> #10 0xc0319138 in ufs_vnoperate (ap=0x0) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2792
> #11 0xc025a497 in bwrite (bp=0xce661980) at vnode_if.h:1116
> #12 0xc025acfc in bawrite (bp=0x0) at /usr/src/sys/kern/vfs_bio.c:1139
> #13 0xc030ab59 in ffs_fsync (ap=0xdb832350) at /usr/src/sys/ufs/ffs/ffs_vnops.c:247
> #14 0xc0309d03 in ffs_sync (mp=0xc41c3e00, waitfor=2, cred=0xc150de80, td=0xc040eb20) at vnode_if.h:627
> #15 0xc027024b in sync (td=0xc040eb20, uap=0x0) at /usr/src/sys/kern/vfs_syscalls.c:142
> #16 0xc02128bf in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:281
> #17 0xc0213176 in panic (fmt=0xc039f254 "%s") at /usr/src/sys/kern/kern_shutdown.c:550
> #18 0xc0373446 in trap_fatal (frame=0xdb8324e8, eva=0) at /usr/src/sys/i386/i386/trap.c:818
> #19 0xc03730b2 in trap_pfault (frame=0xdb8324e8, usermode=0, eva=3735929318)
>     at /usr/src/sys/i386/i386/trap.c:732
> #20 0xc0372c6d in trap (frame=
>     {tf_fs = 24, tf_es = 16, tf_ds = 16, tf_edi = 0, tf_esi = -831494876, tf_ebp = -612162216, tf_isp = -6
>     12162284, tf_ebx = -559038242, tf_edx = 0, tf_ecx = -1069303248, tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_
>     eip = -1070567550, tf_cs = 8, tf_eflags = 66182, tf_esp = -1069607688, tf_ss = 1})
>     at /usr/src/sys/i386/i386/trap.c:417
> #21 0xc0306f82 in getdirtybuf (bpp=0xc546ebbc, mtx=0x0, waitfor=1)
>     at /usr/src/sys/ufs/ffs/ffs_softdep.c:5827
> #22 0xc030601d in flush_deplist (listhead=0x0, waitfor=1, errorp=0xdb832590)
>     at /usr/src/sys/ufs/ffs/ffs_softdep.c:5271
> #23 0xc0305f29 in flush_inodedep_deps (fs=0xc41ca000, ino=918604)
>     at /usr/src/sys/ufs/ffs/ffs_softdep.c:5235
> #24 0xc0305977 in softdep_sync_metadata (ap=0xdb8326d4) at /usr/src/sys/ufs/ffs/ffs_softdep.c:4968
> #25 0xc030ac69 in ffs_fsync (ap=0xdb8326d4) at /usr/src/sys/ufs/ffs/ffs_vnops.c:299
> #26 0xc02f61cd in ffs_truncate (vp=0xc5b25000, length=26112, flags=2052, cred=0xc44c9e80, td=0xc531a980)
>     at vnode_if.h:627
> #27 0xc0312b29 in ufs_direnter (dvp=0xc5b25000, tvp=0xc4dde6d8, dirp=0xdb832910, cnp=0xdb832c00,
>     newdirbp=0x0) at /usr/src/sys/ufs/ufs/ufs_lookup.c:966
> #28 0xc0318e4d in ufs_makeinode (mode=33188, dvp=0xc5b25000, vpp=0xdb832bec, cnp=0xdb832c00)
>     at /usr/src/sys/ufs/ufs/ufs_vnops.c:2541
> #29 0xc0314f89 in ufs_create (ap=0xdb832a78) at /usr/src/sys/ufs/ufs/ufs_vnops.c:199
> #30 0xc0319138 in ufs_vnoperate (ap=0x0) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2792
> #31 0xc0278218 in vn_open_cred (ndp=0xdb832bd8, flagp=0xdb832cd8, cmode=420, cred=0xc44c9e80, fdidx=0)
>     at vnode_if.h:118
> #32 0xc0278040 in vn_open (ndp=0x0, flagp=0x0, cmode=0, fdidx=0) at /usr/src/sys/kern/vfs_vnops.c:93
> #33 0xc0271060 in kern_open (td=0xc531a980, path=0x0, pathseg=UIO_USERSPACE, flags=1539, mode=438)
>     at /usr/src/sys/kern/vfs_syscalls.c:688
> #34 0xc0270f10 in open (td=0x0, uap=0x0) at /usr/src/sys/kern/vfs_syscalls.c:654
> #35 0xc0373763 in syscall (frame=
>     {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = -1077938472, tf_esi = 16, tf_ebp = -1077938744, tf_isp =
>     -612160140, tf_ebx = 135094816, tf_edx = 176, tf_ecx = 17, tf_eax = 5, tf_trapno = 12, tf_err = 2, tf_eip =
>     134911639, tf_cs = 31, tf_eflags = 514, tf_esp = -1077938788, tf_ss = 47})
>     at /usr/src/sys/i386/i386/trap.c:1005
>
>
>
> - Christian
>
> --
> Christian Brueffer	chris_at_unixpages.org	brueffer_at_FreeBSD.org
> GPG Key:	 http://people.freebsd.org/~brueffer/brueffer.key.asc
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>