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-rw-r--r--mm/compaction.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index c4b344a95032..a08bf219f88c 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -680,9 +680,6 @@ static int __compact_pgdat(pg_data_t *pgdat, struct compact_control *cc)
int zoneid;
struct zone *zone;
- /* Flush pending updates to the LRU lists */
- lru_add_drain_all();
-
for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
zone = &pgdat->node_zones[zoneid];
@@ -727,17 +724,12 @@ int compact_pgdat(pg_data_t *pgdat, int order)
static int compact_node(int nid)
{
- pg_data_t *pgdat;
struct compact_control cc = {
.order = -1,
.sync = true,
};
- if (nid < 0 || nid >= nr_node_ids || !node_online(nid))
- return -EINVAL;
- pgdat = NODE_DATA(nid);
-
- return __compact_pgdat(pgdat, &cc);
+ return __compact_pgdat(NODE_DATA(nid), &cc);
}
/* Compact all nodes in the system */
@@ -745,6 +737,9 @@ static int compact_nodes(void)
{
int nid;
+ /* Flush pending updates to the LRU lists */
+ lru_add_drain_all();
+
for_each_online_node(nid)
compact_node(nid);
@@ -777,7 +772,14 @@ ssize_t sysfs_compact_node(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- compact_node(dev->id);
+ int nid = dev->id;
+
+ if (nid >= 0 && nid < nr_node_ids && node_online(nid)) {
+ /* Flush pending updates to the LRU lists */
+ lru_add_drain_all();
+
+ compact_node(nid);
+ }
return count;
}