From: Andrew Morton <akpm@linux-foundation.org>
Date: Tue, 16 Jun 2009 22:32:37 +0000 (-0700)
Subject: page-allocator: warn if __GFP_NOFAIL is used for a large allocation
X-Git-Tag: v2.6.31-rc1~299^2~114
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dab48dab37d2770824420d1e01730a107fade1aa;p=pandora-kernel.git

page-allocator: warn if __GFP_NOFAIL is used for a large allocation

__GFP_NOFAIL is a bad fiction.  Allocations _can_ fail, and callers should
detect and suitably handle this (and not by lamely moving the infinite
loop up to the caller level either).

Attempting to use __GFP_NOFAIL for a higher-order allocation is even
worse, so add a once-off runtime check for this to slap people around for
even thinking about trying it.

Cc: David Rientjes <rientjes@google.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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