[PATCH 3/3] mm,oom: Suppress unnecessary "sharing same memory" message.

[Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>]

oom_kill_process() sends SIGKILL to other thread groups sharing
victim's mm. But printing

  "Kill process %d (%s) sharing same memory\n"

lines makes no sense if they already have pending SIGKILL.
This patch reduces the "Kill process" lines by printing
that line with info level only if SIGKILL is not pending.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: David Rientjes <rientjes@google.com>
---
 mm/oom_kill.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 408aa8e..81962d7 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -579,9 +579,11 @@ void oom_kill_process(struct oom_control *oc, struct task_struct *p,
 		    !(p->flags & PF_KTHREAD)) {
 			if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
 				continue;
+			if (fatal_signal_pending(p))
+				continue;
 
 			task_lock(p);	/* Protect ->comm from prctl() */
-			pr_err("Kill process %d (%s) sharing same memory\n",
+			pr_info("Kill process %d (%s) sharing same memory\n",
 				task_pid_nr(p), p->comm);
 			task_unlock(p);
 			do_send_sig_info(SIGKILL, SEND_SIG_FORCED, p, true);
-- 
1.8.3.1

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