[PATCH] Add __GFP_THISNODE to avoid fallback to other nodes and ignore cpuset/memory policy restrictions
Add a new gfp flag __GFP_THISNODE to avoid fallback to other nodes. This
flag is essential if a kernel component requires memory to be located on a
certain node. It will be needed for alloc_pages_node() to force allocation
on the indicated node and for alloc_pages() to force allocation on the
current node.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 208a6b03..ea498788 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -893,6 +893,9 @@
* See also cpuset_zone_allowed() comment in kernel/cpuset.c.
*/
do {
+ if (unlikely((gfp_mask & __GFP_THISNODE) &&
+ (*z)->zone_pgdat != zonelist->zones[0]->zone_pgdat))
+ break;
if ((alloc_flags & ALLOC_CPUSET) &&
!cpuset_zone_allowed(*z, gfp_mask))
continue;
