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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2009-03-31 15:23:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 08:59:15 -0700
commit327c0e968645f2601a43f5ea7c19c7b3a5fa0a34 (patch)
treeacc6789c120a6d5000ceebf51e690d14c6cfcacb /mm
parentramfs-nommu: use generic lru cache (diff)
downloadlinux-dev-327c0e968645f2601a43f5ea7c19c7b3a5fa0a34.tar.xz
linux-dev-327c0e968645f2601a43f5ea7c19c7b3a5fa0a34.zip
vmscan: fix it to take care of nodemask
try_to_free_pages() is used for the direct reclaim of up to SWAP_CLUSTER_MAX pages when watermarks are low. The caller to alloc_pages_nodemask() can specify a nodemask of nodes that are allowed to be used but this is not passed to try_to_free_pages(). This can lead to unnecessary reclaim of pages that are unusable by the caller and int the worst case lead to allocation failure as progress was not been make where it is needed. This patch passes the nodemask used for alloc_pages_nodemask() to try_to_free_pages(). Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c3
-rw-r--r--mm/vmscan.c13
2 files changed, 13 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index cbd532161f68..0284e528748d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1582,7 +1582,8 @@ nofail_alloc:
reclaim_state.reclaimed_slab = 0;
p->reclaim_state = &reclaim_state;
- did_some_progress = try_to_free_pages(zonelist, order, gfp_mask);
+ did_some_progress = try_to_free_pages(zonelist, order,
+ gfp_mask, nodemask);
p->reclaim_state = NULL;
lockdep_clear_current_reclaim_state();
diff --git a/mm/vmscan.c b/mm/vmscan.c
index f4619c6cd59e..06e72693b458 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -78,6 +78,12 @@ struct scan_control {
/* Which cgroup do we reclaim from */
struct mem_cgroup *mem_cgroup;
+ /*
+ * Nodemask of nodes allowed by the caller. If NULL, all nodes
+ * are scanned.
+ */
+ nodemask_t *nodemask;
+
/* Pluggable isolate pages callback */
unsigned long (*isolate_pages)(unsigned long nr, struct list_head *dst,
unsigned long *scanned, int order, int mode,
@@ -1538,7 +1544,8 @@ static void shrink_zones(int priority, struct zonelist *zonelist,
struct zone *zone;
sc->all_unreclaimable = 1;
- for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) {
+ for_each_zone_zonelist_nodemask(zone, z, zonelist, high_zoneidx,
+ sc->nodemask) {
if (!populated_zone(zone))
continue;
/*
@@ -1683,7 +1690,7 @@ out:
}
unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
- gfp_t gfp_mask)
+ gfp_t gfp_mask, nodemask_t *nodemask)
{
struct scan_control sc = {
.gfp_mask = gfp_mask,
@@ -1694,6 +1701,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
.order = order,
.mem_cgroup = NULL,
.isolate_pages = isolate_pages_global,
+ .nodemask = nodemask,
};
return do_try_to_free_pages(zonelist, &sc);
@@ -1714,6 +1722,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
.order = 0,
.mem_cgroup = mem_cont,
.isolate_pages = mem_cgroup_isolate_pages,
+ .nodemask = NULL, /* we don't care the placement */
};
struct zonelist *zonelist;