Re: Kernel 2.6.8.1: swap storm of death - CFQ scheduler=culprit

Jens Axboe
2004-08-23T17:01:22Z

On Mon, Aug 23 2004, Karl Vogel wrote:
> > > Jens, is this huge amount of bio/biovec's allocations
> > expected with CFQ? Its really really bad.
> >
> > Nope, it's not by design :-)
> >
> > A test case would be nice, then I'll fix it as soon as possible. But
> > please retest with 2.6.8.1 marcelo, 2.6.8-rc4 is missing an important
> > fix to ll_rw_blk that can easily cause this. The first report is for
> > 2.6.8.1, so I'm more puzzled on that.
>
> I tried with 2.6.8.1 and 2.6.8.1-mm4, both had the problem. If there
> is anything extra I need to try/record, just shoot!
>
> Original post with testcase + stats:
> http://article.gmane.org/gmane.linux.kernel/228156

Good report, I'll reproduce it here tomorrow. Thanks!

--
Jens Axboe