From: Davidlohr Bueso <davidlohr@hp.com>
Date: Wed, 4 Jun 2014 23:06:47 +0000 (-0700)
Subject: mm,vmacache: optimize overflow system-wide flushing
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~56^2~16^2~223
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6b4ebc3a9078c5b7b8c4cf495a0b1d2d0e0bfe7a;p=pandora-kernel.git

mm,vmacache: optimize overflow system-wide flushing

For single threaded workloads, we can avoid flushing and iterating through
the entire list of tasks, making the whole function a lot faster,
requiring only a single atomic read for the mm_users.

Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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