lkml.org 
[lkml]   [2009]   [Oct]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC]cfq-iosched: improve hw_tag detection
On Mon, Oct 26, 2009 at 07:35:55PM +0800, Jens Axboe wrote:
> On Mon, Oct 26 2009, Shaohua Li wrote:
> > If active queue hasn't enough requests and idle window opens, cfq will not
> > dispatch sufficient requests to hardware. In such situation, current code
> > will zero hw_tag. But this is because cfq doesn't dispatch enough requests
> > instead of hardware queue doesn't work. Don't zero hw_tag in such case.
>
> Thanks, that looks like a good fix. Curious, is this fixing some
> regression at your end?
No, just observed such issue when I play with cfq.

Thanks,
Shaohua


\
 
 \ /
  Last update: 2009-10-27 01:53    [W:0.043 / U:0.300 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site