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

[Nick Piggin]

Samium Gromoff wrote:

> At Mon, 2 Feb 2004 23:07:45 -0800,
> Andrew Morton wrote:
>  
>
> > Samium Gromoff <deepfire@xxxxxxxxxxxxxxxx> 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.
> >    
>
> Right. I`m rather emotional about this...
>
> Kind of hard seeing the all starry and shiny 2.6 going down the toilet on my
> little server with 16M RAM.
>
>  
>
> > 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.
> >    
>
> Hmmm, i`d prefer plain 2.6, but i`ll try it anyway.
>
>  

It should go against plain 2.6 with luck.

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