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SubjectRe: 2.6.1-rc1 [resend]
On Wed, Dec 31, 2003 at 04:00:07PM +0100, Paolo Ornati wrote:
> With 2.6.1-rc1 I have noticed a strange IDE performance change.
> Results of "hdparm -t /dev/hda" with 2.6.0 kernel:
> (readahead = 256): ~26.31 MB/s
> (readahead = 128): ~31.82 MB/s
> PS = readahead is set to 256 by default on my system, 128 seems to be the
> best value
> Results of "hdparm -t /dev/hda" with 2.6.1-rc1 kernel:
> (readahead = 256): ~26.41 MB/s
> (readahead = 128): ~26.27 MB/s
> Setting readahead to 128 doesn't have the same effect with the new kernel...

What io scheduler are you using? Or, could you post /var/log/dmesg?


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