From: Weijie Yang <weijie.yang@samsung.com>
Date: Thu, 9 Oct 2014 22:28:12 +0000 (-0700)
Subject: mm: page_alloc: avoid wakeup kswapd on the unintended node
X-Git-Tag: omap-for-v3.19/prcm-cleanup~134^2~62
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7ade3c997208566c5bf50ece8fc319a8caf0d41a;p=pandora-kernel.git

mm: page_alloc: avoid wakeup kswapd on the unintended node

When entering the page_alloc slowpath, we wakeup kswapd on every pgdat
according to the zonelist and high_zoneidx.  However, this doesn't take
nodemask into account, and could prematurely wakeup kswapd on some
unintended nodes.

This patch uses for_each_zone_zonelist_nodemask() instead of
for_each_zone_zonelist() in wake_all_kswapds() to avoid the above
situation.

Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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