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Subject99% CPU by kswapd on kernel 2.4.13
Hi,

I'v noticed that Mr Les Schaffer <schaffer@optonline.net> had reported such
problem on Oct 30 in his mail entiled "2.4.13 (SMP): kswapd working furiously,
to no effect". So this mail is just to say that the problem had hit more than
one persons.

I encountered this kswapd problem yesterday after the machine ruuning for 22 hours:
kswapd crazily use 99% of CPU time even if I switched to single mode.
About half an hour ago, when I starting build the newly 2.2.20 kernel and
opened a Mozilla session, I noticed that kswapd got crazy again:

12:48am up 1 day, 7:05, 14 users, load average: 2.38, 3.01, 2.37
76 processes: 72 sleeping, 4 running, 0 zombie, 0 stopped
CPU states: 0.0% user, 99.6% system, 0.3% nice, 0.0% idle
Mem: 385280K av, 361776K used, 23504K free, 0K shrd, 10744K buff
Swap: 128484K av, 1160K used, 127324K free 187740K cached

PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
5 root 19 0 0 0 0 RW 0 99.0 0.0 9:37 kswapd
8337root 17 5 1268 1268 1068 R N 0 0.9 0.3 0:05 top
1 root 8 0 476 476 412 S 0 0.0 0.1 0:04 init
2 root 9 0 0 0 0 SW 0 0.0 0.0 0:02 keventd
3 root 9 0 0 0 0 SW 0 0.0 0.0 0:00 kapm-idled
4 root 19 19 0 0 0 SWN 0 0.0 0.0 0:00 ksoftirqd_CP
6 root 9 0 0 0 0 SW 0 0.0 0.0 0:00 bdflush
7 root 9 0 0 0 0 SW 0 0.0 0.0 0:03 kupdated
8 root 9 0 0 0 0 SW 0 0.0 0.0 0:00 khubd
56 root 9 0 0 0 0 SW 0 0.0 0.0 0:01 kjournald

Howerver it become quite quiet now. I don't know who has made it
calm down :-)

1:19am up 1 day, 7:36, 14 users, load average: 0.38, 0.32, 0.92
84 processes: 83 sleeping, 1 running, 0 zombie, 0 stopped
CPU states: 0.0% user, 2.1% system, 1.7% nice, 96.0% idle
Mem: 385280K av, 380824K used, 4456K free, 0K shrd, 9444K buff
Swap: 128484K av, 904K used, 127580K free 188712K cached

PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
8337 pzw 16 5 1268 1268 1068 S N 0 1.3 0.3 0:26 top
9373 pzw 17 5 1268 1268 1068 R N 0 1.3 0.3 0:00 top
9356 pzw 16 5 28864 28M 14064 S N 0 1.1 7.4 1:00 mozilla-bin
1 root 8 0 476 476 412 S 0 0.0 0.1 0:04 init
2 root 9 0 0 0 0 SW 0 0.0 0.0 0:02 keventd
3 root 9 0 0 0 0 SW 0 0.0 0.0 0:00 kapm-idled
4 root 19 19 0 0 0 SWN 0 0.0 0.0 0:00 ksoftirqd_CP
5 root 9 0 0 0 0 SW 0 0.0 0.0 21:58 kswapd
6 root 9 0 0 0 0 SW 0 0.0 0.0 0:00 bdflush
7 root 9 0 0 0 0 SW 0 0.0 0.0 0:03 kupdated
8 root 9 0 0 0 0 SW 0 0.0 0.0 0:00 khubd
56 root 9 0 0 0 0 SW 0 0.0 0.0 0:01 kjournald
58 root 9 0 0 0 0 SW 0 0.0 0.0 0:00 kreiserfsd
104 root 9 0 460 460 404 S 0 0.0 0.1 0:00 apmd
248 root 9 0 552 552 460 S 0 0.0 0.1 0:00 syslogd
258 root 9 0 1052 1052 404 S 0 0.0 0.2 0:00 klogd

Regards
Zhaowang Peng






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