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

Nick Piggin
2004-02-03T07:58:55Z

Samium Gromoff wrote:

>At Mon, 2 Feb 2004 23:07:45 -0800,
>Andrew Morton wrote:
>
>
>>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.
>>
>>
>
>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.