lkml.org 
[lkml]   [2016]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0.14] oom detection rework v6
On Wed 04-05-16 10:12:43, Vlastimil Babka wrote:
> On 05/04/2016 07:45 AM, Joonsoo Kim wrote:
> >I still don't agree with some part of this patchset that deal with
> >!costly order. As you know, there was two regression reports from Hugh
> >and Aaron and you fixed them by ensuring to trigger compaction. I
> >think that these show the problem of this patchset. Previous kernel
> >doesn't need to ensure to trigger compaction and just works fine in
> >any case.
>
> IIRC previous kernel somehow subtly never OOM'd for !costly orders. So
> anything that introduces the possibility of OOM may look like regression for
> some corner case workloads.

The bug fixed by this series was COMPACTION specific because
compaction_ready is not considered otherwise.
--
Michal Hocko
SUSE Labs

\
 
 \ /
  Last update: 2016-05-04 11:21    [W:0.160 / U:5.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site