Re: 2.5.60-bk pdflush oops.

Andrew Morton (akpm@digeo.com)
Thu, 13 Feb 2003 13:23:00 -0800


Dave Jones <davej@codemonkey.org.uk> wrote:
>
> Bitkeeper pull from ~5 hrs ago.
>
> Something went splat just after booting.
> I think this may have happened as I mounted an NFS mount.
> Hard to tell, but the box booted at 20:30, this happened
> at 20:37, and I started NFS testing at 20:40 which was
> when I noticed it.

There is missing text here as well.

if (address < PAGE_SIZE)
printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
else
printk(KERN_ALERT "Unable to handle kernel paging request");
printk(" at virtual address %08lx\n",address);
printk(" printing eip:\n");

> Feb 13 20:37:41 mesh kernel: printing eip:
> Feb 13 20:37:41 mesh kernel: c012e276
> Feb 13 20:37:41 mesh kernel: Oops: 0002
> Feb 13 20:37:41 mesh kernel: CPU: 0
> Feb 13 20:37:41 mesh kernel: EIP: 0060:[<c012e276>] Not tainted
> Feb 13 20:37:41 mesh kernel: EFLAGS: 00010046
> Feb 13 20:37:41 mesh kernel: EIP is at mod_timer+0x96/0x7e0
> Feb 13 20:37:41 mesh kernel: eax: 00000000 ebx: c0147440 ecx: 00000007 edx: 00001388
> Feb 13 20:37:41 mesh kernel: esi: 850fc085 edi: c06436c0 ebp: c11c7ed0 esp: c11c7ea0
> Feb 13 20:37:41 mesh kernel: ds: 007b es: 007b ss: 0068
> Feb 13 20:37:41 mesh kernel: Process pdflush (pid: 5, threadinfo=c11c6000 task=c113d980)
> Feb 13 20:37:41 mesh kernel: Stack: c11c7ec0 c0146229 c11c7f04 00000000 00000080 c0147320 c11c7ee4 00000000
> Feb 13 20:37:41 mesh kernel: 00000297 000733cf c11c7ee4 00000000 c11c7f90 c0147426 c06436c0 000733cf
> Feb 13 20:37:41 mesh kernel: 0006ab17 00000000 00000000 c11c7ee0 00000000 00000001 00000000 00000001
> Feb 13 20:37:41 mesh kernel: Call Trace:
> Feb 13 20:37:41 mesh kernel: [<c0146229>] __get_page_state+0x29/0x90
> Feb 13 20:37:41 mesh kernel: [<c0147320>] wb_kupdate+0x0/0x120

That is a statically stored timer. It would appear that some other timer
from some other random part of the kernel has got itself scribbled on.

Maybe networking?
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