From: Michal Hocko <mhocko@kernel.org>
Date: Sat, 10 Sep 2016 10:34:03 +0000 (+1000)
Subject: mm/oom_kill.c: fix task_will_free_mem() comment
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9b41488d5bda8ba008d3a228b0a83378dd48a564;p=deliverable%2Flinux.git

mm/oom_kill.c: fix task_will_free_mem() comment

Attempt to demystify the task_will_free_mem() loop.

Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index ef175518f05f..463cdd22d4e0 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -803,8 +803,9 @@ static bool task_will_free_mem(struct task_struct *task)
 		return true;
 
 	/*
-	 * This is really pessimistic but we do not have any reliable way
-	 * to check that external processes share with our mm
+	 * Make sure that all tasks which share the mm with the given tasks
+	 * are dying as well to make sure that a) nobody pins its mm and
+	 * b) the task is also reapable by the oom reaper.
 	 */
 	rcu_read_lock();
 	for_each_process(p) {