Re: Linux 2.4.10-ac11

From: Mike Fedyk (
Date: Wed Oct 10 2001 - 21:59:15 EST

On Thu, Oct 11, 2001 at 04:22:28AM +0200, Matthias Andree wrote:
> On Thu, 11 Oct 2001, Alan Cox wrote:
> > * Small fixes to various long standing bugs, various architecture and
> > * driver cleanups. The 2.4.10-ac tree now seems pretty solid.
> > *
> >
> > 2.4.10-ac11
> > o Further VM tuning (Rik van Riel)
> Short version: Kicks ass!
> Long version: the sluggishness that 2.4.9, 2.4.10 and the previous -ac
> versions suffered from (not sure if 2.4.7 was also sluggish) seems to be
> gone, the machine is much quieter now and does not look like paralysed
> for seconds every now and then. Stress tests need to be done, but a make
> -j on various DJB tools which would start up only slowly now quickly
> zoom through.

Hmm, I'm still seeing jerky swap out performance with make -j 30 on 256MB
workstation. Swap in is good and smooth though. I would see kswapd taking
about 10% (with 30 gcc processes on a 2x366 celeron) just before it would
swap out about 5000 blocks in one second (actually, the entire system
stalled for about 5-10 seconds, and vmstat wouldn't even report in that
time period).


Would you be interested in a vmstat output from kernel compile that is
guaranteed to generate swap out?

I thought of sending both output of make and vmstat to syslog (to get
timestamps and an idea of exactly what is happening during the vmstat

If so, I can write up a little script that can send the output of vmstat, a
diff of /proc/meminfo, and make output from kernel compile.

Or would that be too much data to look at?

> However, one thing strikes me on boot: ext3fs claims it's 0.9.6, while
> the ext3 web site tells us about 0.9.10. What's going on with 2.4.x-ac
> ext3fs? Should I be concerned?

No, the ext3 guys are working on a merge patch for -ac right now. Though
you won't see it on the ext3 for 2.4 web site... Check the ext2-devel
archive for the last week or so...

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