Re: 2.6.1 slower than 2.4, smp/scsi/sw-raid/reiserfs

Andrew Morton
2004-02-03T07:06:29Z

Samium Gromoff <deepfire@sic-elvis.zel.ru> wrote:
>
>
> > > The machine is a dual P3 450MHz, 512MB, aic7xxx, 2 disk RAID-0 and
> > > ReiserFS. It's a few years old and has always run Linux, most
> > > recently 2.4.24. I decided to try 2.6.1 and the performance is
> > > disappointing.
> >
> > 2.6 has a few performance problems under heavy pageout at present. Nick
> > Piggin has some patches which largely fix it up.
>
> I`m sorry, but this is misguiding. 2.6 does not have a few performance
> problems under heavy pageout.
>

As you have frequently and somewhat redundantly reminded us.

Perhaps you could test Nick's patches. They are at

http://www.kerneltrap.org/~npiggin/vm/

Against 2.6.2-rc2-mm2. First revert vm-rss-limit-enforcement.patch, then
apply those three.