lkml.org 
[lkml]   [2017]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH BUGFIX/IMPROVEMENT V2 0/3] three bfq fixes restoring service guarantees with random sync writes in bg
On Thu, Aug 31, 2017 at 03:42:57PM +0100, Mel Gorman wrote:
> On Thu, Aug 31, 2017 at 08:46:28AM +0200, Paolo Valente wrote:
> > [SECOND TAKE, with just the name of one of the tester fixed]
> >
> > Hi,
> > while testing the read-write unfairness issues reported by Mel, I
> > found BFQ failing to guarantee good responsiveness against heavy
> > random sync writes in the background, i.e., multiple writers doing
> > random writes and systematic fdatasync [1]. The failure was caused by
> > three related bugs, because of which BFQ failed to guarantee to
> > high-weight processes the expected fraction of the throughput.
> >
>
> Queued on top of Ming's most recent series even though that's still a work
> in progress. I should know in a few days how things stand.
>

The problems with parallel heavy writers seem to have disappeared with this
series. There are still revisions taking place on Ming's to overall setting
of legacy vs mq is still a work in progress but this series looks good.

Thanks.

--
Mel Gorman
SUSE Labs

\
 
 \ /
  Last update: 2017-09-04 10:15    [W:0.073 / U:3.960 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site