diff options
| -rw-r--r-- | mm/memcontrol.c | 44 |
1 files changed, 17 insertions, 27 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 5318c3fb92f4..0451cc06b157 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1796,20 +1796,16 @@ static void memcg_oom_recover(struct mem_cgroup *memcg) __wake_up(&memcg_oom_waitq, TASK_NORMAL, 0, memcg); } -enum oom_status { - OOM_SUCCESS, - OOM_FAILED, - OOM_ASYNC, - OOM_SKIPPED -}; - -static enum oom_status mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order) +/* + * Returns true if successfully killed one or more processes. Though in some + * corner cases it can return true even without killing any process. + */ +static bool mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order) { - enum oom_status ret; - bool locked; + bool locked, ret; if (order > PAGE_ALLOC_COSTLY_ORDER) - return OOM_SKIPPED; + return false; memcg_memory_event(memcg, MEMCG_OOM); @@ -1832,14 +1828,13 @@ static enum oom_status mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int * victim and then we have to bail out from the charge path. */ if (memcg->oom_kill_disable) { - if (!current->in_user_fault) - return OOM_SKIPPED; - css_get(&memcg->css); - current->memcg_in_oom = memcg; - current->memcg_oom_gfp_mask = mask; - current->memcg_oom_order = order; - - return OOM_ASYNC; + if (current->in_user_fault) { + css_get(&memcg->css); + current->memcg_in_oom = memcg; + current->memcg_oom_gfp_mask = mask; + current->memcg_oom_order = order; + } + return false; } mem_cgroup_mark_under_oom(memcg); @@ -1850,10 +1845,7 @@ static enum oom_status mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int mem_cgroup_oom_notify(memcg); mem_cgroup_unmark_under_oom(memcg); - if (mem_cgroup_out_of_memory(memcg, mask, order)) - ret = OOM_SUCCESS; - else - ret = OOM_FAILED; + ret = mem_cgroup_out_of_memory(memcg, mask, order); if (locked) mem_cgroup_oom_unlock(memcg); @@ -2546,7 +2538,6 @@ static int try_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp_mask, int nr_retries = MAX_RECLAIM_RETRIES; struct mem_cgroup *mem_over_limit; struct page_counter *counter; - enum oom_status oom_status; unsigned long nr_reclaimed; bool passed_oom = false; bool may_swap = true; @@ -2649,9 +2640,8 @@ retry: * a forward progress or bypass the charge if the oom killer * couldn't make any progress. */ - oom_status = mem_cgroup_oom(mem_over_limit, gfp_mask, - get_order(nr_pages * PAGE_SIZE)); - if (oom_status == OOM_SUCCESS) { + if (mem_cgroup_oom(mem_over_limit, gfp_mask, + get_order(nr_pages * PAGE_SIZE))) { passed_oom = true; nr_retries = MAX_RECLAIM_RETRIES; goto retry; |