[PATCH 8/8] memcg: generate file modified notifications on "memory.events"
From: Tejun Heo <tj@kernel.org>
Date: 2015-08-11 17:58:49
Also in:
lkml
Subsystem:
control group - memory resource controller (memcg), memory management, the rest · Maintainers:
Johannes Weiner, Michal Hocko, Roman Gushchin, Shakeel Butt, Andrew Morton, Linus Torvalds
cgroup core only recently grew generic notification support. Wire up "memory.events" so that it triggers a file modified event whenever its content changes. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Li Zefan <redacted> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> --- mm/memcontrol.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 78ba418..10db5f1 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c@@ -295,6 +295,9 @@ struct mem_cgroup { /* OOM-Killer disable */ int oom_kill_disable; + /* handle for "memory.events" */ + struct cgroup_file events_file; + /* protect arrays of thresholds */ struct mutex thresholds_lock;
@@ -5499,6 +5502,7 @@ static struct cftype memory_files[] = { { .name = "events", .flags = CFTYPE_NOT_ON_ROOT, + .file_offset = offsetof(struct mem_cgroup, events_file), .seq_show = memory_events_show, }, { } /* terminate */
@@ -5530,6 +5534,7 @@ void mem_cgroup_events(struct mem_cgroup *memcg, unsigned int nr) { this_cpu_add(memcg->stat->events[idx], nr); + cgroup_file_notify(&memcg->events_file); } /**
--
2.4.3