Messages in this thread | | | Subject | Re: [BUG] 2.5.65-mm3 kernel BUG at fs/ext3/super.c:1795! | From | Alexander Hoogerhuis <> | Date | 22 Mar 2003 03:55:30 +0100 |
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Andrew Morton <akpm@digeo.com> writes:
> Alexander Hoogerhuis <alexh@ihatent.com> wrote: > > > > Andrew Morton <akpm@digeo.com> writes: > > > > > > [SNIP] > > > > > > > Disk I/O on my machine froze up during very light work after a few > > hours, luckily I had a window open on another machine so I could do a > > simple capture and save the info: > > > > kernel BUG at fs/ext3/super.c:1795! > > invalid operand: 0000 [#1] > > CPU: 0 > > EIP: 0060:[<c018b522>] Not tainted VLI > > EFLAGS: 00010246 > > EIP is at ext3_write_super+0x36/0x94 > > eax: 00000000 ebx: c8834000 ecx: efb5904c edx: efb59000 > > esi: efb59000 edi: c8834000 ebp: c8835ecc esp: c8835ec0 > > ds: 007b es: 007b ss: 0068 > > Process pdflush (pid: 7853, threadinfo=c8834000 task=ed0a5880) > > Stack: c8835ee4 00000287 efb5904c c8835ee4 c0153148 efb59000 00000077 51eb851f > > c8835fcc c8835fa4 c0137fd0 c03892fc 007b9f47 007b168f 00000000 00000000 > > c8835ef4 00000000 00000001 00000000 00000001 00000000 00000053 00000000 > > Call Trace: > > [<c0153148>] sync_supers+0xde/0xea > > [<c0137fd0>] wb_kupdate+0x68/0x161 > > [<c0118985>] schedule+0x1a4/0x3ac > > [<c01386e8>] __pdflush+0xdc/0x1d8 > > [<c01387e4>] pdflush+0x0/0x15 > > [<c01387f5>] pdflush+0x11/0x15 > > [<c0137f68>] wb_kupdate+0x0/0x161 > > [<c0108e69>] kernel_thread_helper+0x5/0xb > > How on earth did you do that? > > sync_supers() does lock_super, then calls ext3_write_super. > > ext3_write_super() does a down_trylock() on sb->s_lock and goes BUG > if it acquired the lock. > > So you've effectively done this: > > down(&sem); > if (down_trylock(&sem)) > BUG(); > > This can only be a random memory scribble, a hardware bug or a > preempt-related bug in down_trylock().
Heh. My "portable murphy field" if powerful. Honestly, all I did was to have a few gnome-terminals, an emacs or two, a few mozillas and a bit more up, same as always, and jut "just happened" (that's what all kids claim when they break stuff) :)
mvh, A -- Alexander Hoogerhuis | alexh@ihatent.com CCNP - CCDP - MCNE - CCSE | +47 908 21 485 "You have zero privacy anyway. Get over it." --Scott McNealy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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