problem with kswapd

Arthur Pedyczak (arthur-p@home.com)
Fri, 5 Nov 1999 09:58:09 -0500

Hi,
I have been having problems with kswapd function. The symptoms:
After 2-3 days of operation the status of kswapd process changes to Z (zombie).
At the same time, the following message apears in the system log:
=====================================================================
Oct 30 12:14:43 cs865114-a kernel: Unable to handle kernel NULL pointer derefere
nce at virtual address 00000014
Oct 30 12:14:43 cs865114-a kernel: current->tss.cr3 = 00101000, %cr3 = 00101000
Oct 30 12:14:43 cs865114-a kernel: *pde = 00000000
Oct 30 12:14:43 cs865114-a kernel: Oops: 0000
Oct 30 12:14:43 cs865114-a kernel: CPU: 0
Oct 30 12:14:43 cs865114-a kernel: EIP: 0010:[try_to_free_buffers+18/132]
Oct 30 12:14:43 cs865114-a kernel: EFLAGS: 00010203
Oct 30 12:14:43 cs865114-a kernel: eax: 00000000 ebx: c03973d0 ecx: 00009db2
edx: 0001ffe0
Oct 30 12:14:43 cs865114-a kernel: esi: 00000000 edi: cffedbc0 ebp: c03973d0
esp: cffd1fa8
Oct 30 12:14:43 cs865114-a kernel: ds: 0018 es: 0018 ss: 0018
Oct 30 12:14:43 cs865114-a kernel: Process kswapd (pid: 5, process nr: 5, stackp
age=cffd1000)
Oct 30 12:14:43 cs865114-a kernel: Stack: 00000030 cffd0000 c011cf06 c03973d0 00
00000b 00000006 c0121c1a 00000006
Oct 30 12:14:43 cs865114-a kernel: 00000030 00000000 c01a642e cffd01c1 c0
121cbf 00000030 00000f00 cffebfcc
Oct 30 12:14:43 cs865114-a kernel: c0106000 00000e00 c01087cb 00000000 00
000f00 c01e3fd8
Oct 30 12:14:43 cs865114-a kernel: Call Trace: [shrink_mmap+214/300] [do_try_to_
free_pages+38/120] [tvecs+7310/13344] [kswapd+83/196] [get_options+0/116] [kerne
l_thread+35/48]
Oct 30 12:14:43 cs865114-a kernel: Code: 8b 76 14 83 78 20 00 75 06 f6 40 18 46
74 0f 6a 00 e8 6c 01
============================================================================

I have been seing the same bahaviour wtih kernel 2.2.12 (pre-build from RedHat 6.1
distribution and custom build - no difference) and kernel 2.2.13.

Can anybody help???

Arthur Pedyczak
arthur-p@home.com

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