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On Tue, 2003-12-30 at 00:58, Thomas Molina wrote: >> It certainly looks like DMA is enabled. Under 2.4 I get: >> [root@lap root]# hdparm /dev/hda [...] >> readahead = 8 (on) [...] >> Under 2.6 I get: >> [root@lap root]# hdparm /dev/hda [...] >> readahead = 256 (on) On Tue, Dec 30, 2003 at 01:14:45AM +0200, Martin Schlemmer wrote: > Increase your readahead: > # hdparm -a 8192 /dev/hda > BTW: As we really do get this question a _lot_ of times, why > don't the ide layer automatically set a higher readahead > if there is enough cache on the drive or something? Could you try lowering 2.6's readahead to 2.4's levels in order to rule out readahead-induced thrashing? -- wli - 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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