From: David Rientjes <rientjes@google.com>
Date: Sun, 6 May 2007 21:49:32 +0000 (-0700)
Subject: cpusets: allow TIF_MEMDIE threads to allocate anywhere
X-Git-Tag: v2.6.22-rc1~971
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c596d9f320aaf30d28c1d793ff3a976dee1db8f5;p=pandora-kernel.git

cpusets: allow TIF_MEMDIE threads to allocate anywhere

OOM killed tasks have access to memory reserves as specified by the
TIF_MEMDIE flag in the hopes that it will quickly exit.  If such a task has
memory allocations constrained by cpusets, we may encounter a deadlock if a
blocking task cannot exit because it cannot allocate the necessary memory.

We allow tasks that have the TIF_MEMDIE flag to allocate memory anywhere,
including outside its cpuset restriction, so that it can quickly die
regardless of whether it is __GFP_HARDWALL.

Cc: Andi Kleen <ak@suse.de>
Cc: Paul Jackson <pj@sgi.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: 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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