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SubjectRe: SMP instability in 2.4.21-pre3-ac4, oops provided
From: Jurriaan <thunder7@xs4all.nl>
Date: Tue, Jan 28, 2003 at 08:30:30AM +0100
> I'm seeing instability in my new system, a dual Intel P3/1400 tualatin
> system.

I just had another fine specimen. Written down by hand, omitted the
stack values. Can this kmem_cache_alloc_batch function have anything to
do with the 512 K cache size of these Pentium/3 Tualatin CPU's as
opposed to 256 K for normal Pentium/3 Coppermine CPU's?

ksymoops 2.4.8 on i686 2.4.21-pre3-ac4. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.21-pre3-ac4/ (default)
-m /boot/System.map-2.4.21-pre3-ac4 (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.

Unable to handle kernel paging request at virtual address 594e94b8
c013e564
*pde = 00000000
Oops: 000
CPU: 0
EIP: 0010:[<c013e564>] Tainted: PF
Using defaults from ksymoops -t elf32-i386 -a i386
Call Trace: [<c013f4ab>] [<c014db03>] [<c014dc4b>] [<c014df46>] [<c014e852>]
[<c01371d4>] [<c0137328>] [<c01873b0>] [<c0137585>] [<c0137c17>] [<c0138053>]
[<c013859a>] [<c0138470>] [<c014a2e6>] [<c011724c>] [<c0107abf>]
Code: 8b 44 81 18 0f af 5a 18 8b 51 0c 89 41 14 01 d3 40 74 57 86


>>EIP; c013e564 <kmem_cache_alloc_batch+84/140> <=====

Trace; c013f4ab <__kmem_cache_alloc+5b/1c0>
Trace; c014db03 <get_unused_buffer_head+d3/180>
Trace; c014dc4b <create_buffers+2b/160>
Trace; c014df46 <create_empty_buffers+26/70>
Trace; c014e852 <block_read_full_page+262/280>
Trace; c01371d4 <add_to_page_cache_unique+b4/f0>
Trace; c0137328 <page_cache_read+118/140>
Trace; c01873b0 <reiserfs_get_block+0/11c0>
Trace; c0137585 <__lock_page+b5/d0>
Trace; c0137c17 <generic_file_readahead+c7/160>
Trace; c0138053 <do_generic_file_read+363/520>
Trace; c013859a <generic_file_read+9a/150>
Trace; c0138470 <file_read_actor+0/90>
Trace; c014a2e6 <sys_read+96/1d0>
Trace; c011724c <smp_apic_timer_interrupt+13c/140>
Trace; c0107abf <system_call+33/38>

Code; c013e564 <kmem_cache_alloc_batch+84/140>
00000000 <_EIP>:
Code; c013e564 <kmem_cache_alloc_batch+84/140> <=====
0: 8b 44 81 18 mov 0x18(%ecx,%eax,4),%eax <=====
Code; c013e568 <kmem_cache_alloc_batch+88/140>
4: 0f af 5a 18 imul 0x18(%edx),%ebx
Code; c013e56c <kmem_cache_alloc_batch+8c/140>
8: 8b 51 0c mov 0xc(%ecx),%edx
Code; c013e56f <kmem_cache_alloc_batch+8f/140>
b: 89 41 14 mov %eax,0x14(%ecx)
Code; c013e572 <kmem_cache_alloc_batch+92/140>
e: 01 d3 add %edx,%ebx
Code; c013e574 <kmem_cache_alloc_batch+94/140>
10: 40 inc %eax
Code; c013e575 <kmem_cache_alloc_batch+95/140>
11: 74 57 je 6a <_EIP+0x6a>
Code; c013e577 <kmem_cache_alloc_batch+97/140>
13: 86 00 xchg %al,(%eax)


1 warning issued. Results may not be reliable.
--
Whoever thought that one up should have his head examined. Bloody minstrels...
Simon R Green - Blue Moon Rising
GNU/Linux 2.4.21-pre3-ac4 SMP/ReiserFS 2x2824 bogomips load av: 0.33 0.49 0.23
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