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

[Mel Gorman]

On Fri, Apr 18, 2014 at 04:48:25PM -0400, John Stoffel wrote:
> >>>>> "Andrew" == Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes:
> 
> Andrew> 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.
> 
> 
> This is unclear here.  "see major performance <what> due" doesn't make
> sense to me.  
> 

Degradation

-- 
Mel Gorman
SUSE Labs
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