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SubjectRe: 2.4.13 (SMP): kswapd working furiously, to no effect


Please try the newest .14-pre.

Thanks

On Mon, 29 Oct 2001, Les Schaffer wrote:

> I noticed a problem for the last several days (2.4.13 Tyan PIII Dual)
> but couldnt put my finger on it till i started paying attention:
> kswapd is working furiously, but accomplishing nothing.
>
> that is, kswapd is logging lots of CPU time, but no swap space is
> being used. (see below).
>
> i dont recall having problems until towards the end of the day (i
> shutdown at nite). when i open or close a netscape session for
> example, or do a dpkg blah-blah, the process hangs for a long time
> before getting going. at one point prior to the 'top' below, i had
> something like 500XXXK used, and still not a drop, err byte, of swap
> used.
>
> this behavior was not occuring with 2.4.12 (will check tmw) and
> earlier versions.
>
> les schaffer
>
> ================= INFO =================
> speggy)~/: dmesg | grep swap
> Starting kswapd
> Adding Swap: 506036k swap-space (priority -1)
>
> --------------
>
> (speggy)~/: top
>
> 19:07:09 up 13:12, 3 users, load average: 1.68, 1.45, 1.24
> 69 processes: 66 sleeping, 3 running, 0 zombie, 0 stopped
> CPU states: 14.4% user, 85.5% system, 0.0% nice, 0.1% idle
> Mem: 513916K total, 443932K used, 69984K free, 7808K buffers
> Swap: 506036K total, 0K used, 506036K free, 166992K cached
>
> PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
> 2873 godzilla 9 0 31984 30M 12272 S 0.0 6.0 0:00 mozilla-bin
> [ mozilla-bin repeated ad infinitum)
> 356 godzilla 9 0 27528 26M 3688 S 0.0 5.3 4:16 xemacs
> 298 root 6 -10 202M 26M 4120 S < 0.9 5.1 9:04 XFree86
> 335 godzilla 9 0 7672 7668 6100 S 0.0 1.4 0:17 gabber
> 326 godzilla 9 0 4908 4908 3812 S 0.0 0.9 0:06 panel
> [ etc ... ]
> 3 root 19 19 0 0 0 SWN 0.0 0.0 0:00 ksoftirqd_CPU0
> 4 root 19 19 0 0 0 SWN 0.0 0.0 0:00 ksoftirqd_CPU1
> 5 root 19 0 0 0 0 RW 95.9 0.0 282:40 kswapd
> 6 root 9 0 0 0 0 SW 0.0 0.0 0:00 bdflush
>
> --------------
>
> (speggy)~/: ps uxwa // about 50 minutes after 'top' above
>
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
> root 5 37.9 0.0 0 0 ? SW 05:54 315:56 [kswapd]
>
> --------------
>
> (speggy)/proc/: cat swaps
> Filename Type Size Used Priority
> /dev/hda4 partition 506036 0 -1
>
>
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