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-rw-r--r--mm/memcontrol.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 78a928d9026..f8a6a39c440 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -132,6 +132,7 @@ struct mem_cgroup {
*/
spinlock_t lru_lock;
unsigned long control_type; /* control RSS or RSS+Pagecache */
+ int prev_priority; /* for recording reclaim priority */
/*
* statistics.
*/
@@ -451,6 +452,25 @@ long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
return (long) (active / (inactive + 1));
}
+/*
+ * prev_priority control...this will be used in memory reclaim path.
+ */
+int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
+{
+ return mem->prev_priority;
+}
+
+void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, int priority)
+{
+ if (priority < mem->prev_priority)
+ mem->prev_priority = priority;
+}
+
+void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, int priority)
+{
+ mem->prev_priority = priority;
+}
+
unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,