Messages in this thread | | | Date | Tue, 30 Mar 2004 15:49:48 +0200 | From | Jens Axboe <> | Subject | Re: [PATCH] speed up SATA |
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On Tue, Mar 30 2004, Marc Bevand wrote: > On 30 Mar 2004, Jens Axboe wrote: > | On Tue, Mar 30 2004, Marc Bevand wrote: > | [...] > | > As other people were complaining that the 32MB max request size might be too > | > high, I did give a try to 1MB (by replacing "65534" by "2046" in the patch). > | > There is no visible differences between 32MB and 1MB. > | > | As suspected. BTW, you want to use 2048 there, not 2046. The 64K-2 > | (which could be 64K-1) is just due to ->max_sectors being an unsigned > | short currently. > > Okay, I thought the 2 sectors were used to store some extra > informations. > > I also forgot to mention that there does not seem to have any > *latency* differences between 32MB and 1MB. Strange...
That's because you are not generating requests that big anyways.
-- Jens Axboe
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