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> > 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. It`s more like _systematical_ _performance_ _degradation_ increasing with the pageout rate. The more the box pages out the more 2.6 lags behind 2.4. What i`m trying to say is that even light paging is affected. And light paging is warranted when you run, say, KDE on 128M ram. Go measure the X desktop startup time on a 48M/64M boxen--even light paging causes 2.6 to be just sloower. Also the vm thrashing point is much much earlier. Ask Roger Luethi for details. regards, Samium Gromoff - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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