Messages in this thread |  | | Date | Wed, 11 Oct 2000 15:35:40 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: 2.2.17 Crash |
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On Wed, 11 Oct 2000, Mike Elmore wrote:
> All, > > Had a crash this morning for the first time in a while... > 2.2.17 Locked up Cold. > > Machine is a SMP 2xPII450 w/ 128M RAM on a Tyan Tiger100 > BX board. > > Here's the kernel output: > ---------------------------------------- > Oct 11 08:29:30 lingas kernel: Unable to handle kernel paging request at virtual address 40000020 > Oct 11 08:29:30 lingas kernel: current->tss.cr3 = 00101000, %cr3 = 00101000 > Oct 11 08:29:30 lingas kernel: *pde = 00000000 > Oct 11 08:29:30 lingas kernel: Oops: 0000 > Oct 11 08:29:30 lingas kernel: CPU: 1 > Oct 11 08:29:30 lingas kernel: EIP: 0010:[try_to_free_buffers+28/236] > Oct 11 08:29:30 lingas kernel: EFLAGS: 00010282 > Oct 11 08:29:30 lingas kernel: eax: 00072420 ebx: c03a1890 ecx: 00000001 edx: 00010000 > Oct 11 08:29:30 lingas kernel: esi: 40000000 edi: 40000000 ebp: c03a1890 esp: c7f9df8c > Oct 11 08:29:30 lingas kernel: ds: 0018 es: 0018 ss: 0018 > Oct 11 08:29:30 lingas kernel: Process kswapd (pid: 5, process nr: 6, stackpage=c7f9d000) > Oct 11 08:29:30 lingas kernel: Stack: 00000001 00000030 ffffffff c01201d6 c03a1890 00000001 c7f9c000 0000000d > Oct 11 08:29:30 lingas kernel: 00000006 00000001 00000001 c01254af 00000006 00000030 c7f9c000 c0201dfa > Oct 11 08:29:30 lingas kernel: c7f9c2b9 00008000 c7f9c000 c7f9c000 c01255a7 00000030 00000f00 c7ff3fbc > Oct 11 08:29:30 lingas kernel: Call Trace: [shrink_mmap+294/376] [do_try_to_free_pages+103/240] [tvecs+8634/13632] [kswapd+111/152] [get_options+0/116] [kernel_thread+35/48] > Oct 11 08:29:30 lingas kernel: Code: 83 7e 20 00 75 62 f6 46 18 46 75 5c 8b 76 14 39 fe 75 ed 89 > Oct 11 08:29:57 lingas kernel: Unable to handle kernel paging request at virtual address 80000020 > Oct 11 08:29:57 lingas kernel: current->tss.cr3 = 06a11000, %cr3 = 06a11000 > Oct 11 08:29:57 lingas kernel: *pde = 00000000 > Oct 11 08:29:57 lingas kernel: Oops: 0000 > Oct 11 08:29:57 lingas kernel: CPU: 0 > ---------------------------------------- > > What are the possible causes of such a thing?
Here is the code which causes the problem:
int try_to_free_buffers(struct page * page_map, int wait) { struct buffer_head * tmp, * bh = page_map->buffers; int too_many;
tmp = bh; do { if (buffer_busy(tmp)) goto busy; tmp = tmp->b_this_page; } while (tmp != bh);
succeed:
...
The problem is that "page_map->buffers" is pointing to the address "40000000".
Now I'm not sure if this can be caused by a memory problem.
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