From patchwork Wed Mar 25 06:17:07 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Weiner X-Patchwork-Id: 6088551 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 26AA49F350 for ; Wed, 25 Mar 2015 06:19:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4F4C22013A for ; Wed, 25 Mar 2015 06:19:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 795DE200E8 for ; Wed, 25 Mar 2015 06:19:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752541AbbCYGRl (ORCPT ); Wed, 25 Mar 2015 02:17:41 -0400 Received: from gum.cmpxchg.org ([85.214.110.215]:50842 "EHLO gum.cmpxchg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752441AbbCYGRf (ORCPT ); Wed, 25 Mar 2015 02:17:35 -0400 From: Johannes Weiner To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Linus Torvalds , Andrew Morton , Tetsuo Handa , Huang Ying , Andrea Arcangeli , Dave Chinner , Michal Hocko , Theodore Ts'o Subject: [patch 03/12] mm: oom_kill: switch test-and-clear of known TIF_MEMDIE to clear Date: Wed, 25 Mar 2015 02:17:07 -0400 Message-Id: <1427264236-17249-4-git-send-email-hannes@cmpxchg.org> X-Mailer: git-send-email 2.3.3 In-Reply-To: <1427264236-17249-1-git-send-email-hannes@cmpxchg.org> References: <1427264236-17249-1-git-send-email-hannes@cmpxchg.org> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP exit_oom_victim() already knows that TIF_MEMDIE is set, and nobody else can clear it concurrently. Use clear_thread_flag() directly. Signed-off-by: Johannes Weiner Acked-by: Michal Hocko --- mm/oom_kill.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index b2f081fe4b1a..4b9547be9170 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -435,8 +435,7 @@ void mark_oom_victim(struct task_struct *tsk) */ void exit_oom_victim(void) { - if (!test_and_clear_thread_flag(TIF_MEMDIE)) - return; + clear_thread_flag(TIF_MEMDIE); down_read(&oom_sem); /*