lkml.org 
[lkml]   [2001]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.4.14-pre6
Andrew Morton wrote:

> Another potential microoptimisation would be to write out
> clean blocks if that helps merging. So if we see a write
> for blocks 1,2,3,5,6,7 and block 4 is known to be in memory,
> then write it out too. I suspect this would be a win for
> ATA but a loss for SCSI. Not sure.
>

A not to stupid disk would implement the seek to block 5
as waiting for block 4 to move past. So
rewriting block 4 probably wouldn't help. could be
interesting to see a benchmark for that though, perhaps
some drives are really dumb.

The average "half rotation delay" when seeking does not apply
when the seek _isn't_ random.

Helge Hafting
-
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 13:12    [W:0.098 / U:0.004 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site