[2.6.0-test7-bk][OOPS] Unable to handle kernel paging request at virtual address f9a7e857

[2.6.0-test7-bk][OOPS] Unable to handle kernel paging request at virtual address f9a7e857

[Ramón Rey Vicente]

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Unable to handle kernel paging request at virtual address f9a7e857
 printing eip:
c0169361
*pde = 00000000
Oops: 0000 [#2]
CPU:    0
EIP:    0060:[<c0169361>]    Not tainted
EFLAGS: 00010217
EIP is at mpage_readpages+0x41/0x140
eax: c01602af   ebx: f9a7e853   ecx: caab053c   edx: caab053c
esi: f9a7e84b   edi: 00000000   ebp: caab072c   esp: cfe03e04
ds: 007b   es: 007b   ss: 0068  
Process kswapd0 (pid: 8, threadinfo=cfe02000 task=cfe08ca0)
Stack: 00000000 00000000 00000000 00000000 cfe03e10 00000000 c02ef348
c011e55a
       00000000 00000001 c011e36c 00000046 cfe02000 00000000 00000000
c02cca00
       c010aaef c0273900 c80b5f40 c80b6c8c cfe02000 00000028 caab072c
caab072c
Call Trace:
 [<c011e55a>] tasklet_action+0x3a/0x60
 [<c011e36c>] do_softirq+0x8c/0xa0
 [<c010aaef>] do_IRQ+0xef/0x120
 [<c0180536>] ext3_readpages+0x16/0x20
 [<c01602af>] prune_dcache+0x14f/0x1c0
 [<c017f840>] ext3_get_block+0x0/0x80
 [<c0162b23>] iput+0x63/0x80
 [<c01602af>] prune_dcache+0x14f/0x1c0
 [<c0160753>] shrink_dcache_memory+0x33/0x40
 [<c013a508>] shrink_slab+0x108/0x160
 [<c013b783>] balance_pgdat+0x1c3/0x1e0
 [<c013b89e>] kswapd+0xfe/0x120
 [<c0118c60>] autoremove_wake_function+0x0/0x40
 [<c0108ed6>] ret_from_fork+0x6/0x20
 [<c0118c60>] autoremove_wake_function+0x0/0x40
 [<c013b7a0>] kswapd+0x0/0x120
 [<c0107061>] kernel_thread_helper+0x5/0x24

Code: 8b 43 04 8b 13 89 42 04 89 10 c7 43 04 00 02 20 00 c7 03 00

-- 
Ramón Rey Vicente       <ramon dot rey at hispalinux dot es>
        jabber ID       <rreylinux at jabber dot org>
GPG public key ID 	0xBEBD71D5 -> http://pgp.escomposlinux.org/

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Re: [2.6.0-test7-bk][OOPS] Unable to handle kernel paging request at virtual address f9a7e857

[Andrew Morton]

Ramón Rey Vicente <ramon.rey@hispalinux.es> wrote:
>
> Unable to handle kernel paging request at virtual address f9a7e857
>   printing eip:
>  c0169361
>  *pde = 00000000
>  Oops: 0000 [#2]
>  CPU:    0
>  EIP:    0060:[<c0169361>]    Not tainted
>  EFLAGS: 00010217
>  EIP is at mpage_readpages+0x41/0x140
>  eax: c01602af   ebx: f9a7e853   ecx: caab053c   edx: caab053c
>  esi: f9a7e84b   edi: 00000000   ebp: caab072c   esp: cfe03e04
>  ds: 007b   es: 007b   ss: 0068  
>  Process kswapd0 (pid: 8, threadinfo=cfe02000 task=cfe08ca0)
>  Stack: 00000000 00000000 00000000 00000000 cfe03e10 00000000 c02ef348
>  c011e55a
>         00000000 00000001 c011e36c 00000046 cfe02000 00000000 00000000
>  c02cca00
>         c010aaef c0273900 c80b5f40 c80b6c8c cfe02000 00000028 caab072c
>  caab072c
>  Call Trace:
>   [<c011e55a>] tasklet_action+0x3a/0x60
>   [<c011e36c>] do_softirq+0x8c/0xa0
>   [<c010aaef>] do_IRQ+0xef/0x120
>   [<c0180536>] ext3_readpages+0x16/0x20
>   [<c01602af>] prune_dcache+0x14f/0x1c0
>   [<c017f840>] ext3_get_block+0x0/0x80
>   [<c0162b23>] iput+0x63/0x80
>   [<c01602af>] prune_dcache+0x14f/0x1c0
>   [<c0160753>] shrink_dcache_memory+0x33/0x40
>   [<c013a508>] shrink_slab+0x108/0x160
>   [<c013b783>] balance_pgdat+0x1c3/0x1e0
>   [<c013b89e>] kswapd+0xfe/0x120
>   [<c0118c60>] autoremove_wake_function+0x0/0x40
>   [<c0108ed6>] ret_from_fork+0x6/0x20
>   [<c0118c60>] autoremove_wake_function+0x0/0x40
>   [<c013b7a0>] kswapd+0x0/0x120
>   [<c0107061>] kernel_thread_helper+0x5/0x24

You get the award for the weirdest bug report of the 21st century.  There
is just no way in which kswapd can call ->readpages().

The only thing I can think of is that an inode's superblock's ->put_inode
pointer somehow got set to point at ext3_readpages().  Or we got a
completely wild pointer in prune_dcache().  Some sort of memory scribble,
anyway.

What sort of machine is it?  Nice, new and stable or old, nasty and likely
to tromp its memory?

Re: [2.6.0-test7-bk][OOPS] Unable to handle kernel paging request at virtual address f9a7e857

[Ramón Rey Vicente]

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El lun, 13-10-2003 a las 12:34, Andrew Morton escribió:

> You get the award for the weirdest bug report of the 21st century.  There
> is just no way in which kswapd can call ->readpages().
> 
> The only thing I can think of is that an inode's superblock's ->put_inode
> pointer somehow got set to point at ext3_readpages().  Or we got a
> completely wild pointer in prune_dcache().  Some sort of memory scribble,
> anyway.
> 
> What sort of machine is it?  Nice, new and stable or old, nasty and likely
> to tromp its memory?

My machine is a k6-2 450, 256 MiB of RAM, and is stable and solid. I use
it as my desktop system, and the memory keeps coherent always, after
hours of activity. No crashes, no randomly hangs,...
-- 
Ramón Rey Vicente       <ramon dot rey at hispalinux dot es>
        jabber ID       <rreylinux at jabber dot org>
GPG public key ID 	0xBEBD71D5 -> http://pgp.escomposlinux.org/

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