From nobody Fri Apr 19 00:56:54 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3C83C433EF for ; Sat, 14 May 2022 07:53:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230008AbiENHxD (ORCPT ); Sat, 14 May 2022 03:53:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229779AbiENHwv (ORCPT ); Sat, 14 May 2022 03:52:51 -0400 Received: from mail-pj1-x1044.google.com (mail-pj1-x1044.google.com [IPv6:2607:f8b0:4864:20::1044]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36866A1B1 for ; Sat, 14 May 2022 00:52:36 -0700 (PDT) Received: by mail-pj1-x1044.google.com with SMTP id c1-20020a17090a558100b001dca2694f23so9758678pji.3 for ; Sat, 14 May 2022 00:52:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=9kAA0uCEYwZFDz59hPllk4M4/jt+7xzfL8ut7F5jG6Q=; b=i8f3tAxBvaDfFYiDPd/kfXBTvmRLxSQjGJwGgd5Lla/1qNwGm2bvlqEn8+j5k4OyEY Ys0QQQ+aUww+WnvB3a4WEcH/rBiotPA6kXy4PZnHQbuvi8QNQ6EophHw03VlSHuqfYYT RL9314D8x5C5lBSGjf+JJ1XrJ+WzLviQuzh7jvANHHGJH9Tu6Ep4/mJ6JD54Oiv4jMun Fwv+HC5Vo/D9pV+8xZg6/FAsQCaqVLKpTIPcdX1lKLPBeFz44pd1FlRq9dmThQBcFVvc /Gr3DVI/RrZ8xWlEKVI86S7SFzIrjkJ9R9nQLFYlQ5lYBsRLIMVw/p0t0NKNuETI6Dxp 85xg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=9kAA0uCEYwZFDz59hPllk4M4/jt+7xzfL8ut7F5jG6Q=; b=SHORAHIocXtGkLQLNRaKDddOlC0DVVvtDdgjfqV91czyFWQsjx7flSDKtQHCGrBnDY Y4sG0W0SJB6P1bu28a7MimnATcJijRjgYKOBUXNj7fqiDg3PGjT5D7SR/F2jjiNomX5m o71d1JvJMd8Ebo/qJPL9g6olxkzNpxiRxfH/i07uBc0RsR+uvk8Ec096sJIRD7F45xeh N0RyEnbrFqJvR8TMbpDcu7AwWehgRzdCMisbSWjKxHag8oCp/Krc7woV8fW1C3rcVZ1B iMNarQ5Hh0WCPMf14S8Kvygy+iDeFX8XxfSLbr+1i044Trt4Cn6dT95aJp7vfApepaVI xwiQ== X-Gm-Message-State: AOAM533t2yNFEzde4WTkjOneHNCe7QAGDMpvATNfm5hHg+IVif063XDT /r0VfhUyppt+hSXJSyYIwtM= X-Google-Smtp-Source: ABdhPJwALc97+Ztc4kOjUbmkvfnjzktBbydfixTh093DwDApZfPo7PIKJ5gqQv7GyZie3g2/VhqGLA== X-Received: by 2002:a17:90b:350d:b0:1dc:6680:6f1d with SMTP id ls13-20020a17090b350d00b001dc66806f1dmr19966890pjb.27.1652514755798; Sat, 14 May 2022 00:52:35 -0700 (PDT) Received: from pc ([199.15.76.19]) by smtp.gmail.com with ESMTPSA id ij16-20020a170902ab5000b0015e8d4eb209sm3104746plb.83.2022.05.14.00.52.33 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sat, 14 May 2022 00:52:34 -0700 (PDT) Date: Sat, 14 May 2022 15:52:28 +0800 From: Zhaoyu Liu To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] mm/oom_kill: break evaluation when a task has been selected Message-ID: <20220514075223.GA11384@pc> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" oom points no longer need to be calculated if a task is oom_task_origin(), so return 1 to stop the oom_evaluate_task(). Signed-off-by: Zhaoyu Liu --- mm/oom_kill.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 3996301450e8..b407fba21d19 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -308,7 +308,7 @@ static enum oom_constraint constrained_alloc(struct oom= _control *oc) static int oom_evaluate_task(struct task_struct *task, void *arg) { struct oom_control *oc =3D arg; - long points; + long points =3D 0; =20 if (oom_unkillable_task(task)) goto next; @@ -349,7 +349,7 @@ static int oom_evaluate_task(struct task_struct *task, = void *arg) oc->chosen =3D task; oc->chosen_points =3D points; next: - return 0; + return points =3D=3D LONG_MAX; abort: if (oc->chosen) put_task_struct(oc->chosen); --=20 2.17.1