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-rw-r--r--include/linux/memcontrol.h6
-rw-r--r--mm/memcontrol.c14
-rw-r--r--mm/vmscan.c4
3 files changed, 9 insertions, 15 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index ef2b9bd7fafa..6054c9f3a5e8 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -234,8 +234,7 @@ static inline void mem_cgroup_dec_page_stat(struct page *page,
mem_cgroup_update_page_stat(page, idx, -1);
}
-bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg,
- struct mem_cgroup *root);
+bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg);
void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
@@ -435,8 +434,7 @@ static inline void mem_cgroup_dec_page_stat(struct page *page,
}
static inline
-bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg,
- struct mem_cgroup *root)
+bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg)
{
return false;
}
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 65e7bec4b0f0..47cdc7eb1a6b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1760,13 +1760,11 @@ int mem_cgroup_select_victim_node(struct mem_cgroup *memcg)
#endif
/*
- * A group is eligible for the soft limit reclaim under the given root
- * hierarchy if
- * a) it is over its soft limit
+ * A group is eligible for the soft limit reclaim if
+ * a) it is over its soft limit
* b) any parent up the hierarchy is over its soft limit
*/
-bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg,
- struct mem_cgroup *root)
+bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg)
{
struct mem_cgroup *parent = memcg;
@@ -1774,14 +1772,12 @@ bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg,
return true;
/*
- * If any parent up to the root in the hierarchy is over its soft limit
- * then we have to obey and reclaim from this group as well.
+ * If any parent up the hierarchy is over its soft limit then we
+ * have to obey and reclaim from this group as well.
*/
while ((parent = parent_mem_cgroup(parent))) {
if (res_counter_soft_limit_excess(&parent->res))
return true;
- if (parent == root)
- break;
}
return false;
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 17a7134de4d7..0e081cada4ba 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -142,7 +142,7 @@ static bool global_reclaim(struct scan_control *sc)
static bool mem_cgroup_should_soft_reclaim(struct scan_control *sc)
{
- return !mem_cgroup_disabled();
+ return !mem_cgroup_disabled() && global_reclaim(sc);
}
#else
static bool global_reclaim(struct scan_control *sc)
@@ -2195,7 +2195,7 @@ __shrink_zone(struct zone *zone, struct scan_control *sc, bool soft_reclaim)
struct lruvec *lruvec;
if (soft_reclaim &&
- !mem_cgroup_soft_reclaim_eligible(memcg, root)) {
+ !mem_cgroup_soft_reclaim_eligible(memcg)) {
memcg = mem_cgroup_iter(root, memcg, &reclaim);
continue;
}