tree 81e949d2521d4d8d979808feaa9c2a570337a98c
parent 720b17e759a50635c429ccaa2ec3d01edb4f92d6
author Andrew Morton <akpm@linux-foundation.org> 1245191557 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1245206860 -0700

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>