My server crashed twice with same Oops info. It runs apache,mysql,nfs
(client only), it has more than 2GB swap partition (does not use it
very much), 2GB ram, disk is Raptor on SATA...
I have two clones of this machine (computers with same parts, system
is copied by RSYNC) and only one of them has these Oopses. I made
copies of gentoo like this:
1 -> 2 -> 3
...and that one which crashed is "2", so if there was any error
durring rsync from 1->2 it should be repeted on "3", but "3" and "1"
works all the time without any crashes.
When it crushes some process' just stops - for example ps ax stopped
in the middle of list, ctrl+c did not helped, w (/bin/w) did not
showed anything, but dmesg worked and I could login thourgh ssh to try
another command.
The server must work all the time...
Does anybody have an idea what coused this Oops??
Below I added text from dmesg after this Oops. Thanks in advance for any help.
BUG: unable to handle kernel NULL pointer dereference at virtual
address 00000044
printing eip:
c02c4887
*pde = 00000000
Oops: 0002 [#1]
SMP
Modules linked in: nfs lockd nfs_acl sunrpc floppy intel_agp agpgart e100
CPU: 0
EIP: 0060:[<c02c4887>] Not tainted VLI
EFLAGS: 00010202 (2.6.17-gentoo-r4 #1)
EIP is at _spin_lock+0x0/0xf
eax: 00000044 ebx: f5064090 ecx: f5064c68 edx: f5064184
esi: f5064184 edi: 00000000 ebp: 00000001 esp: c2273ec8
ds: 007b es: 007b ss: 0068
Process kswapd0 (pid: 162, threadinfo=c2272000 task=c2201a50)
Stack: c014d48c f5064090 f5064098 00000000 0000002f c01604fb 0000002f 00000080
c5e52248 c446cab8 00000000 00007080 00000081 c20fe520 c01605ce c01394db
001c2000 00000000 00007080 00000003 00000000 00000000 0007172e 000000d0
Call Trace:
<c014d48c> remove_inode_buffers+0x28/0x5b <c01604fb> prune_icache+0xb8/0x177
<c01605ce> shrink_icache_memory+0x14/0x2b <c01394db> shrink_slab+0x13c/0x194
<c013a651> balance_pgdat+0x219/0x335 <c013a859> kswapd+0xec/0xee
<c0128712> autoremove_wake_function+0x0/0x2d <c0128712>
autoremove_wake_function+0x0/0x2d
<c013a76d> kswapd+0x0/0xee <c0100e01> kernel_thread_helper+0x5/0xb
Code: 81 28 00 00 00 01 74 05 e8 3f e8 ff ff c3 ba 00 e0 ff ff 21 e2
81 42 14 00 01 00 00 f0 81 28 00 00 00 01 74 05 e8 22 e8 ff ff c3 <f0>
fe 08 79 09 f3 90 80 38 00 7e f9 eb f2 c3 f0 81 28 00 00 00
EIP: [<c02c4887>] _spin_lock+0x0/0xf SS:ESP 0068:c2273ec8
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