diff options
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 0ae2dc3a1748..670e99b68aa6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -917,7 +917,7 @@ int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, /** * mem_cgroup_page_lruvec - return lruvec for isolating/putting an LRU page * @page: the page - * @zone: zone of the page + * @pgdat: pgdat of the page * * This function is only safe when following the LRU page isolation * and putback protocol: the LRU lock must be held, and the page must @@ -3688,7 +3688,7 @@ static void memcg_event_remove(struct work_struct *work) } /* - * Gets called on POLLHUP on eventfd when user closes it. + * Gets called on EPOLLHUP on eventfd when user closes it. * * Called with wqh->lock held and interrupts disabled. */ @@ -3700,7 +3700,7 @@ static int memcg_event_wake(wait_queue_entry_t *wait, unsigned mode, struct mem_cgroup *memcg = event->memcg; __poll_t flags = key_to_poll(key); - if (flags & POLLHUP) { + if (flags & EPOLLHUP) { /* * If the event has been detached at cgroup removal, we * can simply return knowing the other side will cleanup @@ -5747,6 +5747,20 @@ void mem_cgroup_sk_alloc(struct sock *sk) if (!mem_cgroup_sockets_enabled) return; + /* + * Socket cloning can throw us here with sk_memcg already + * filled. It won't however, necessarily happen from + * process context. So the test for root memcg given + * the current task's memcg won't help us in this case. + * + * Respecting the original socket's memcg is a better + * decision in this case. + */ + if (sk->sk_memcg) { + css_get(&sk->sk_memcg->css); + return; + } + rcu_read_lock(); memcg = mem_cgroup_from_task(current); if (memcg == root_mem_cgroup) @@ -5804,8 +5818,8 @@ bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages) /** * mem_cgroup_uncharge_skmem - uncharge socket memory - * @memcg - memcg to uncharge - * @nr_pages - number of pages to uncharge + * @memcg: memcg to uncharge + * @nr_pages: number of pages to uncharge */ void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages) { |
