lkml.org 
[lkml]   [2004]   [Mar]   [30]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateTue, 30 Mar 2004 15:49:48 +0200
FromJens Axboe <>
SubjectRe: [PATCH] speed up SATA
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

-
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/

\
 
 \ /
  Last update: 2005-03-22 13:02    [W:0.049 / U:0.020 seconds]
©2003-2008 Jasper Spaans