Re: [PATCH 0/2] Disable zone_reclaim_mode by default v2

From: Andrew Morton
Date: Fri Apr 18 2014 - 16:05:59 EST


On Tue, 8 Apr 2014 09:22:58 +0100 Mel Gorman <mgorman@xxxxxxx> wrote:

> Changelog since v1
> o topology comment updates
>
> When it was introduced, zone_reclaim_mode made sense as NUMA distances
> punished and workloads were generally partitioned to fit into a NUMA
> node. NUMA machines are now common but few of the workloads are NUMA-aware
> and it's routine to see major performance due to zone_reclaim_mode being
> enabled but relatively few can identify the problem.
>
> Those that require zone_reclaim_mode are likely to be able to detect when
> it needs to be enabled and tune appropriately so lets have a sensible
> default for the bulk of users.
>

This patchset conflicts with

commit 70ef57e6c22c3323dce179b7d0d433c479266612
Author: Michal Hocko <mhocko@xxxxxxx>
AuthorDate: Mon Apr 7 15:37:01 2014 -0700
Commit: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
CommitDate: Mon Apr 7 16:35:50 2014 -0700

mm: exclude memoryless nodes from zone_reclaim

It was pretty simple to resolve, but please check that I didn't miss
anything.
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