[CentOS] centos + kswapd0 error

-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
Behalf Of Johnny Hughes
Sent: Friday, May 13, 2005 1:04 PM
To: CentOS ML
Subject: RE: [CentOS] centos + kswapd0 error

On Fri, 2005-05-13 at 12:45 -0600, mbeltran at americatel.com.sv wrote:
> >> Hi all
> >> 
> >> I have a box with Centos 4 and qmail with all pathches. since Last
month
> i
> >> have had twice the same problem. The process kswapd0 uses all my
> resources
> >> of CPU and RAM memory and the consequence is that my local queue
grow up
> and
> >> the box go slow too.
> >> 
> >> The first time i guess the problem was the version of the kernel,
so i
> did
> >> an upgrade form kernel.i686 2.6.9-5.0.3.EL to kernel.i686
2.6.9-5.0.5.EL
> >> 
> >> apparently the problem was solved but today the problem came again.
The
> >> following snapshot shows the situation:
> >> 
> >> 
> >> top - 10:53:48 up 16 days, 20:05,  1 user,  load average: 119.27,
116.16,
> >> 114.33
> >> Tasks: 528 total,  13 running, 515 sleeping,   0 stopped,   0
zombie
> >> Cpu(s):  5.4% us, 89.4% sy,  0.0% ni,  0.3% id,  4.8% wa,  0.0% hi,
0.1%
> si
> >> Mem:   2075012k total,  2073404k used,     1608k free,    71056k
buffers
> >> Swap:  4192924k total,  4192924k used,        0k free,    36380k
cached
> >> 
> >> PID    USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+
COMMAND
> >> 60     root      17   0     0    0    0 D 75.4  0.0   585:22.79
kswapd0
> >> 2164   root      15   0  1736  484  432 S 31.0  0.0   31:57.07
> couriertcpd
> >> 16334  vpopmail  19   0  2660  804  668 R 24.7  0.0   0:01.69
imapd
> >> 2158   root      15   0  3264  488  432 S 23.4  0.0   1:17.51
> couriertcpd
> >> 32608  apache    16   0 21604 8440 3016 R 15.5  0.4   1:38.09
httpd
> >> 15284  vpopmail  18   0  4384 1032  760 R 14.9  0.0   0:08.32
> vdelivermail
> >> 
> >> 
> >> 
> >> I really do not know what thing should i do for solve this problem
> >> 
> >> thanks in advance
> >> 
> >> Mario
> >
> >I think this bug is your problem:
> >
> >https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=150971
> >
> >You can try the kernel at:
> >
> >http://people.redhat.com/davej/kernels/RHEL4/RPMS.kernel/
> >
> >(or I can give you version 2.6.9-6.37.EL that is in 4Update1 beta)
> 
> Hi Mr. Hughes
> 
> The kernel version 2.6.9-6.37.EL has known issues

>That is the only other one I have for EL4 (other than the released
>kernels).

>Maybe the 2.6.9-10.EL then ... but that is pretty new ... he just made
>it yesterday :)


Does anyone know if the following is related to the kswapd0 error
outlined above? I have had my server freeze twice (under moderate load)
and give the same error in my /var/log/messages. Or, if it is not
related, does anyone have any ideas what might be causing my server to
freeze (hard reboot needed to bring it back up).

May 13 01:54:04 galactica kernel: Unable to handle kernel paging request
at virtual address 00400000
May 13 01:54:04 galactica kernel:  printing eip:
May 13 01:54:04 galactica kernel: c013bb4b
May 13 01:54:04 galactica kernel: *pde = 00000000
May 13 01:54:04 galactica kernel: Oops: 0000 [#1]
May 13 01:54:04 galactica kernel: SMP
May 13 01:54:04 galactica kernel: Modules linked in: parport_pc lp
parport md5 i
pv6 autofs4 sunrpc dm_mod button battery ac uhci_hcd hw_random e100 mii
ext3 jbd
May 13 01:54:04 galactica kernel: CPU:    0
May 13 01:54:04 galactica kernel: EIP:    0060:[<c013bb4b>]    Not
tainted VLI
May 13 01:54:04 galactica kernel: EFLAGS: 00010097   (2.6.9-5.0.5.ELsmp)
May 13 01:54:04 galactica kernel: EIP is at find_get_pages+0x30/0x50
May 13 01:54:04 galactica kernel: eax: 2002002c   ebx: 00000004   ecx:
00000003   edx: 00400000
May 13 01:54:04 galactica kernel: esi: 0000000e   edi: dedce638   ebp:
c163ae94   esp: c163ae5c
May 13 01:54:04 galactica kernel: ds: 007b   es: 007b   ss: 0068
May 13 01:54:04 galactica kernel: Process kswapd0 (pid: 31,
threadinfo=c163a000 task=c1665670)
May 13 01:54:04 galactica kernel: Stack: 00000000 c163ae8c 000000b4
00000000 c0143e10 c163ae94 dedce588 00000000
May 13 01:54:04 galactica kernel:        c014423a 0000000e ffffffff
dedce638 00000000 00000000 c1219e60 c13b8b80
May 13 02:13:47 galactica syslogd 1.4.1: restart.