cgroup core only recently grew generic notification support. Wire up "memory.events" so that it triggers a file modified event whenever its content changes.
v2: Refreshed on top of mem_cgroup relocation. Signed-off-by: Tejun Heo <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Li Zefan <[email protected]> Cc: Johannes Weiner <[email protected]> --- Hello, Once cgroup/for-4.4 gets propagated to mm, this should apply cleanly. Alternatively, I can apply it through the cgroup tree. Which would you prefer? Thanks. include/linux/memcontrol.h | 4 ++++ mm/memcontrol.c | 1 + 2 files changed, 5 insertions(+) --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -213,6 +213,9 @@ 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; @@ -286,6 +289,7 @@ static inline void mem_cgroup_events(str unsigned int nr) { this_cpu_add(memcg->stat->events[idx], nr); + cgroup_file_notify(&memcg->events_file); } bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5202,6 +5202,7 @@ 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 */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
