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Subject[BUG] in page_alloc.c in 2.4.19-pre10aa2
After some hours under heavy load (=3) I got the following messages in my
logs, here run trough ksymoops. At this time there were running gimp with
xsane, gimp-print and setiathome, which I had forgotten to stop. There
was about 60 MB in swap without much change, swapspace is about 1GB,
memory 512 MB. I am running Debian woody on an Athlon 700. The bug is not
easy reproducable. I have been running 2.4.19-pre10aa2 for several days
without ever seeing it. The real funny thing is: When I stopped X and
tried to reboot, the same thing happened, this time with syslog. Besides
the aa-patches there were no other patches in the kernel but only the
Nvidia-driver, which does not seem to be involved, however.

ksymoops 2.4.5 on i686 2.4.19-pre10. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.19-pre10/ (default)
-m /boot/System.map-2.4.19-pre10 (default)

Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.

kernel BUG at page_alloc.c:95!
invalid operand: 0000
CPU: 0
EIP: 0010:[<c01331e5>] Tainted: P
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: 00000000 ebx: c13e58f0 ecx: c026e620 edx: c026e5a0
esi: c13e58f0 edi: 00000000 ebp: dffd5f18 esp: dffd5eec
ds: 0018 es: 0018 ss: 0018
Process kswapd (pid: 5, stackpage=dffd5000)
Stack: 00000001 c13e58f0 000001d0 dffd5f10 c013b588 c1153704 00000000
c13e58f0
00000000 c13e58f0 00000004 dffd5f50 c0132743 dffd4000 00000c4e
00004a0e
000001d0 c026e6ec c10c01ec 00000001 00000000 c10c01dc 00000020
000001d0
Call Trace: [<c013b588>] [<c0132743>] [<c0132be0>] [<c0132c60>]
[<c0132da6>]
[<c0132e36>] [<c0132f7d>] [<c0108b58>] [<c0132ee0>] [<c0105000>]
[<c0107316>]
[<c0132ee0>]
Code: 0f 0b 5f 00 93 99 23 c0 89 d8 2b 05 b0 75 2d c0 c1 f8 02 69


>>EIP; c01331e5 <__free_pages_ok+45/2c0> <=====

>>ebx; c13e58f0 <_end+10e7e54/1870564>
>>ecx; c026e620 <contig_page_data+0/3a0>
>>edx; c026e5a0 <swapper_space+0/40>
>>esi; c13e58f0 <_end+10e7e54/1870564>
>>ebp; dffd5f18 <END_OF_CODE+82e4939/????>
>>esp; dffd5eec <END_OF_CODE+82e490d/????>

Trace; c013b588 <try_to_release_page+28/60>
Trace; c0132743 <shrink_cache+163/3f0>
Trace; c0132be0 <shrink_caches+30/40>
Trace; c0132c60 <try_to_free_pages+70/100>
Trace; c0132da6 <kswapd_balance_pgdat+56/c0>
Trace; c0132e36 <kswapd_balance+26/40>
Trace; c0132f7d <kswapd+9d/c0>
Trace; c0108b58 <ret_from_fork+0/18>
Trace; c0132ee0 <kswapd+0/c0>
Trace; c0105000 <_stext+0/0>
Trace; c0107316 <kernel_thread+26/40>
Trace; c0132ee0 <kswapd+0/c0>

Code; c01331e5 <__free_pages_ok+45/2c0>
00000000 <_EIP>:
Code; c01331e5 <__free_pages_ok+45/2c0> <=====
0: 0f 0b ud2a <=====
Code; c01331e7 <__free_pages_ok+47/2c0>
2: 5f pop %edi
Code; c01331e8 <__free_pages_ok+48/2c0>
3: 00 93 99 23 c0 89 add %dl,0x89c02399(%ebx)
Code; c01331ee <__free_pages_ok+4e/2c0>
9: d8 2b fsubrs (%ebx)
Code; c01331f0 <__free_pages_ok+50/2c0>
b: 05 b0 75 2d c0 add $0xc02d75b0,%eax
Code; c01331f5 <__free_pages_ok+55/2c0>
10: c1 f8 02 sar $0x2,%eax
Code; c01331f8 <__free_pages_ok+58/2c0>
13: 69 00 00 00 00 00 imul $0x0,(%eax),%eax

kernel BUG at page_alloc.c:95!
invalid operand: 0000
CPU: 0
EIP: 0010:[<c01331e5>] Tainted: P
EFLAGS: 00010286
eax: 00000000 ebx: c13e5370 ecx: c026e620 edx: c026e5a0
esi: c13e5370 edi: 00000000 ebp: cd943d50 esp: cd943d24
ds: 0018 es: 0018 ss: 0018
Process xsane (pid: 3791, stackpage=cd943000)
Stack: 00000001 c13e5370 00000000 d7820004 d7824394 c0130ee2 00000000
c13e5370
00000000 c13e5370 00000020 cd943d88 c0132743 cd942000 00000c80
00004aab
000001d2 c026e6ec c10c0060 00000001 00000000 c10c0050 00000020
000001d2
Call Trace: [<c0130ee2>] [<c0132743>] [<c0132be0>] [<c0132c60>]
[<c01336dc>]
[<c01339cc>] [<c0128de0>] [<d7cbd991>] [<c012901a>] [<c010a1cc>]
[<c01290ef>]
[<c0131dd6>] [<c0116905>] [<c012c1ca>] [<c012c050>] [<c01392f5>]
[<c0138fb0>]
[<c0139241>] [<c0116560>] [<c0108c94>]
Code: 0f 0b 5f 00 93 99 23 c0 89 d8 2b 05 b0 75 2d c0 c1 f8 02 69


>>EIP; c01331e5 <__free_pages_ok+45/2c0> <=====

>>ebx; c13e5370 <_end+10e78d4/1870564>
>>ecx; c026e620 <contig_page_data+0/3a0>
>>edx; c026e5a0 <swapper_space+0/40>
>>esi; c13e5370 <_end+10e78d4/1870564>
>>ebp; cd943d50 <[bsd_comp].data.end+a163e31/144200e1>
>>esp; cd943d24 <[bsd_comp].data.end+a163e05/144200e1>

Trace; c0130ee2 <kmem_cache_alloc+172/1b0>
Trace; c0132743 <shrink_cache+163/3f0>
Trace; c0132be0 <shrink_caches+30/40>
Trace; c0132c60 <try_to_free_pages+70/100>
Trace; c01336dc <balance_classzone+4c/1f0>
Trace; c01339cc <__alloc_pages+14c/270>
Trace; c0128de0 <do_anonymous_page+50/110>
Trace; d7cbd991 <[NVdriver]__nvsym02890+44d/490>
Trace; c012901a <do_no_page+17a/180>
Trace; c010a1cc <do_IRQ+8c/d0>
Trace; c01290ef <handle_mm_fault+cf/e0>
Trace; c0131dd6 <activate_page+86/a0>
Trace; c0116905 <do_page_fault+3a5/640>
Trace; c012c1ca <generic_file_read+10a/130>
Trace; c012c050 <file_read_actor+0/70>
Trace; c01392f5 <sys_read+95/f0>
Trace; c0138fb0 <generic_file_llseek+0/b0>
Trace; c0139241 <sys_llseek+b1/d0>
Trace; c0116560 <do_page_fault+0/640>
Trace; c0108c94 <error_code+34/3c>

Code; c01331e5 <__free_pages_ok+45/2c0>
00000000 <_EIP>:
Code; c01331e5 <__free_pages_ok+45/2c0> <=====
0: 0f 0b ud2a <=====
Code; c01331e7 <__free_pages_ok+47/2c0>
2: 5f pop %edi
Code; c01331e8 <__free_pages_ok+48/2c0>
3: 00 93 99 23 c0 89 add %dl,0x89c02399(%ebx)
Code; c01331ee <__free_pages_ok+4e/2c0>
9: d8 2b fsubrs (%ebx)
Code; c01331f0 <__free_pages_ok+50/2c0>
b: 05 b0 75 2d c0 add $0xc02d75b0,%eax
Code; c01331f5 <__free_pages_ok+55/2c0>
10: c1 f8 02 sar $0x2,%eax
Code; c01331f8 <__free_pages_ok+58/2c0>
13: 69 00 00 00 00 00 imul $0x0,(%eax),%eax


1 warning issued. Results may not be reliable.


regards

Peter Bornemann

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