Subject: [PATCH 09/33] mm: system wide ALLOC_NO_WATERMARK

From: Peter Zijlstra <[email-masked]>
Date: Tue, 30 Oct 2007 17:04:10 +0100

Change ALLOC_NO_WATERMARK page allocation such that the reserves are system
wide - which they are per setup_per_zone_pages_min(), when we scrape the
barrel, do it properly.

Signed-off-by: Peter Zijlstra <[email-masked]>
---
 mm/page_alloc.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -1638,6 +1638,12 @@ restart:
 rebalance:
 	if (alloc_flags & ALLOC_NO_WATERMARKS) {
 nofail_alloc:
+		/*
+		 * break out of mempolicy boundaries
+		 */
+		zonelist = NODE_DATA(numa_node_id())->node_zonelists +
+			gfp_zone(gfp_mask);
+
 		/* go through the zonelist yet again, ignoring mins */
 		page = get_page_from_freelist(gfp_mask, order, zonelist,
 				ALLOC_NO_WATERMARKS);

--