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

From: Nick Piggin (piggin_at_cyberone.com.au)
Date: 02/03/04

  • Next message: Ingo Molnar: "Re: [PATCH 3/4] 2.6.2-rc2-mm2 CPU Hotplug: The Core" 
    Date:	Tue, 03 Feb 2004 18:57:27 +1100
To: Samium Gromoff <deepfire@sic-elvis.zel.ru>

    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.

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