memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge-fix
clean up code comment
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0a588c6..71e9eaa 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2121,20 +2121,19 @@
* 3. call memory reclaim if necessary.
*
* In some special case, if the task is fatal, fatal_signal_pending() or
- * TIF_MEMDIE, this functoion returns -EINTR with filling *ptr as
- * root_mem_cgroup. There are 2 reasons for this. 1st is that
- * fatal threads should quit as soon as possible without any hazards.
- * 2nd is that all page should have valid pc->mem_cgroup if it will be
- * used. If mm is NULL and the caller doesn't pass valid memcg pointer,
- * that's treated as charge to root_mem_cgroup.
+ * has TIF_MEMDIE, this function returns -EINTR while writing root_mem_cgroup
+ * to *ptr. There are two reasons for this. 1: fatal threads should quit as soon
+ * as possible without any hazards. 2: all pages should have a valid
+ * pc->mem_cgroup. If mm is NULL and the caller doesn't pass a valid memcg
+ * pointer, that is treated as a charge to root_mem_cgroup.
*
- * So, try_charge will return
- * 0 ... at success. filling *ptr with a valid memcg pointer.
+ * So __mem_cgroup_try_charge() will return
+ * 0 ... on success, filling *ptr with a valid memcg pointer.
* -ENOMEM ... charge failure because of resource limits.
* -EINTR ... if thread is fatal. *ptr is filled with root_mem_cgroup.
*
- * Unlike exported interface, "oom" parameter is added. if oom==true,
- * oom-killer can be invoked.
+ * Unlike the exported interface, an "oom" parameter is added. if oom==true,
+ * the oom-killer can be invoked.
*/
static int __mem_cgroup_try_charge(struct mm_struct *mm,
gfp_t gfp_mask,
