kswapd eats the cpu without swap

BERECZ Szabolcs (szabi@inf.elte.hu)
Thu, 2 Aug 2001 00:08:00 +0200 (CEST)


Hi!

kernel is 2.4.7-ac3 with the used-once patch.
I have 160M of ram, and I don't use swap at all, but some minutes before
kswapd was eating lot's of cpu (98-100%). the system did not responded for
some 10 seconds, then it worked for some seconds, then it did not responded
again, until I did a swapon. after adding the swap to the system, it
swapped out 148k then everything was ok. kswapd still eat some of the cpu
(0.5% of a k6-2/450). then swapoff, and everything is OK, again.

szabi@traktor:~# cat /proc/modules
nls_iso8859-1 2880 0 (autoclean)
sr_mod 13408 0 (autoclean)
ide-scsi 7680 0
cdrom 27488 0 (autoclean) [sr_mod]
scsi_mod 80112 2 (autoclean) [sr_mod ide-scsi]
isofs 18000 0 (autoclean)
ppp_deflate 39264 0 (autoclean)
bsd_comp 4160 0 (autoclean)
ppp_async 6416 1 (autoclean)
snd-pcm-oss 36768 1 (autoclean)
snd-mixer-oss 8912 0 (autoclean) [snd-pcm-oss]
ppp_generic 14240 3 (autoclean) [ppp_deflate bsd_comp
ppp_async]
slhc 4800 0 (autoclean) [ppp_generic]
agpgart 12704 2 (autoclean)
snd-card-ymfpci 3520 1
snd-opl3 5712 0 [snd-card-ymfpci]
snd-hwdep 3760 0 [snd-opl3]
snd-ymfpci 36272 0 [snd-card-ymfpci]
snd-ac97-codec 21712 0 [snd-ymfpci]
snd-pcm 45888 0 [snd-pcm-oss snd-ymfpci]
snd-timer 8848 0 [snd-opl3 snd-pcm]
snd-mpu401-uart 2848 0 [snd-card-ymfpci]
snd-rawmidi 11744 0 [snd-mpu401-uart]
snd-seq-device 4080 0 [snd-opl3 snd-rawmidi]
snd 25760 0 [snd-pcm-oss snd-mixer-oss
snd-card-ymfpci snd-opl3 snd-hwdep snd-ymfpci snd-ac97-codec snd-pcm
snd-timer snd-mpu401-uart snd-rawmidi snd-seq-device]
soundcore 3984 3 [snd]
iptable_filter 2048 0 (autoclean) (unused)
ip_tables 10592 1 [iptable_filter]
reiserfs 149904 4 (autoclean)
ne2k-pci 5152 1
8390 6176 0 [ne2k-pci]
szabi@traktor:~#

tell me what to do. anything to try? or something about the system?
I will try to reproduce it, but I don't think I will succeed.

Bye,
Szabi

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