[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/kernel/cpuset.c b/kernel/cpuset.c
index 4ea6f0d..7694036 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2316,7 +2316,7 @@
const struct cpuset *cs; /* current cpuset ancestors */
int allowed; /* is allocation in zone z allowed? */
- if (in_interrupt())
+ if (in_interrupt() || (gfp_mask & __GFP_THISNODE))
return 1;
node = z->zone_pgdat->node_id;
might_sleep_if(!(gfp_mask & __GFP_HARDWALL));