From: Mel Gorman <mgorman@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: 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>, Mel Gorman <mgorman@suse.de>
Subject: [PATCH 0/2] Disable zone_reclaim_mode by default
Date: Mon, 7 Apr 2014 23:34:26 +0100 [thread overview]
Message-ID: <1396910068-11637-1-git-send-email-mgorman@suse.de> (raw)
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
disabled 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.
Documentation/sysctl/vm.txt | 17 +++++++++--------
include/linux/mmzone.h | 1 -
mm/page_alloc.c | 17 +----------------
3 files changed, 10 insertions(+), 25 deletions(-)
--
1.8.4.5
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next reply other threads:[~2014-04-07 22:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-07 22:34 Mel Gorman [this message]
2014-04-07 22:34 ` [PATCH 1/2] mm: Disable zone_reclaim_mode by default Mel Gorman
2014-04-07 23:35 ` Johannes Weiner
2014-04-08 1:17 ` Zhang Yanfei
2014-04-08 7:14 ` Andres Freund
2014-04-08 14:14 ` Christoph Lameter
2014-04-08 14:47 ` Mel Gorman
2014-04-07 22:34 ` [PATCH 2/2] mm: page_alloc: Do not cache reclaim distances Mel Gorman
2014-04-07 23:36 ` Johannes Weiner
2014-04-08 1:17 ` Zhang Yanfei
2014-04-08 7:26 ` [PATCH 0/2] Disable zone_reclaim_mode by default Vlastimil Babka
2014-04-08 14:17 ` Christoph Lameter
2014-04-08 14:26 ` Andres Freund
[not found] ` <WM!ea1193ee171854a74828ee30c859d97ff2ce66405ffa3a0b8c31a1233c6a0b55530cdf3cbfcd989c0ec18fef1d533f81!@asav-3.01.com>
2014-04-08 14:46 ` Josh Berkus
2014-04-08 19:53 ` Robert Haas
[not found] ` <WM!55d2a092da9f6180473043487a4eb612ae8195f78d2ffdd83f673ed5cb2cb9659cf61e0c8d5bae23f5c914057bcd2ee4!@asav-3.01.com>
2014-04-08 19:56 ` Josh Berkus
2014-04-09 13:08 ` Mel Gorman
2014-04-08 22:58 ` Christoph Lameter
2014-04-08 23:26 ` Mel Gorman
2014-04-10 10:26 ` Jeremy Harris
2014-04-18 15:49 ` Michal Hocko
2014-04-18 16:44 ` Christoph Lameter
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