From: Mel Gorman <mgorman@suse.de>
To: John Stoffel <john@stoffel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Robert Haas <robertmhaas@gmail.com>,
Josh Berkus <josh@agliodbs.com>,
Andres Freund <andres@2ndquadrant.com>,
Christoph Lameter <cl@linux.com>, Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Michal Hocko <mhocko@suse.cz>
Subject: Re: [PATCH 0/2] Disable zone_reclaim_mode by default v2
Date: Sun, 20 Apr 2014 21:59:23 +0100 [thread overview]
Message-ID: <20140420205923.GA23991@suse.de> (raw)
In-Reply-To: <21329.36761.970643.523119@quad.stoffel.home>
On Fri, Apr 18, 2014 at 04:48:25PM -0400, John Stoffel wrote:
> >>>>> "Andrew" == Andrew Morton <akpm@linux-foundation.org> writes:
>
> Andrew> On Tue, 8 Apr 2014 09:22:58 +0100 Mel Gorman <mgorman@suse.de> 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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prev parent reply other threads:[~2014-04-20 20:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-08 8:22 Mel Gorman
2014-04-08 8:22 ` [PATCH 1/2] mm: Disable zone_reclaim_mode by default Mel Gorman
2014-04-08 8:23 ` [PATCH 2/2] mm: page_alloc: Do not cache reclaim distances Mel Gorman
2014-04-18 20:05 ` [PATCH 0/2] Disable zone_reclaim_mode by default v2 Andrew Morton
2014-04-18 20:48 ` John Stoffel
2014-04-20 20:59 ` Mel Gorman [this message]
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