From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 022A8C433DB for ; Fri, 26 Feb 2021 02:14:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BAE2F64EFA for ; Fri, 26 Feb 2021 02:14:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230087AbhBZCNj (ORCPT ); Thu, 25 Feb 2021 21:13:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229460AbhBZCNh (ORCPT ); Thu, 25 Feb 2021 21:13:37 -0500 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52FBAC061574 for ; Thu, 25 Feb 2021 18:12:57 -0800 (PST) Received: by mail-pf1-x42b.google.com with SMTP id d12so2684143pfo.7 for ; Thu, 25 Feb 2021 18:12:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=yeWyaSel7U9eSxOcBt5qJfEQetEzs7vQl7xINbGhi+A=; b=XY79rE3hGyDbLdFZT8nD2HQ1isKgQ+OFXiOIFTeR5H5a4FsQVMdFmsvacNlq6pS2lJ 6GEHyvu4EenSb95Z985YMZlDcrT9jFr5k6UHhpDX1lTCfy55JW/r0VBqmhCPvs9QvsJS ue0OTjy5vzxt+HAv6Ly+dnAPPjSa+gWpta1e+bGZWtR+GLbTwd+O7w+vE78ZDdO5bYEh vCjFC9c1jP7tyIDYo3u85cqKvMwxnDB4w2K7tS5cV90u4kr6WLzbKDwWTnMcJlrRHxTF h5CM+3Nl9E/dvsPEhZTwffOc2UEJLB/UWrfQuDj5xWjKqKaW9RpZ6L2myBIXiB4XIvD6 MPaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=yeWyaSel7U9eSxOcBt5qJfEQetEzs7vQl7xINbGhi+A=; b=iu68XfP+fWZxDkrKnblpZoLFqNHc4dQ+DapyS85OVlNvfTTUac73NDv9BI+xQMy6YL Xp5l6obfIKojZkWgNBG8fhgDHX9jTsdWByQkf219Pz1YWdYvL1f+O1HQfDzzWbYmhXip 18yhwHaKm3cOaeSv4RDemEhwntJhGCmyFQW1hnwPiq5mdcxTJp7JG8EUH+DuaFlK4uqt in61J4z2lTzkXzHpyDFkmk0qrGmrdTHhUuDV3836izPslGOttarzlJ42MrRxTRO28KWB 0NUX+yEGNluis3Tl/fl27V9MnAMgJuxXlV7TFnlkAtHBU9UwXW/ubXfnNsDsl96CzcbU 9iXQ== X-Gm-Message-State: AOAM530usElRTJpyDiFKAm+DwrmFGYjbLNHrm4h2+PjuureyqOu6dYB2 xH/SXyw5jffS8Ke/KVw1aiUl5tZ9nOY= X-Google-Smtp-Source: ABdhPJw2+rDNi4gbjIsJUVGbsD6lPhwC1Ye+NPiIPMpls61+YQ/vGQj+DCb4ukpnWdAi4yyH7OokWg== X-Received: by 2002:aa7:8f15:0:b029:1ed:9356:a9e with SMTP id x21-20020aa78f150000b02901ed93560a9emr691428pfr.73.1614305576840; Thu, 25 Feb 2021 18:12:56 -0800 (PST) Received: from localhost.localdomain (c-73-93-239-127.hsd1.ca.comcast.net. [73.93.239.127]) by smtp.gmail.com with ESMTPSA id 8sm7773531pfp.171.2021.02.25.18.12.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Feb 2021 18:12:56 -0800 (PST) From: Yang Shi To: hannes@cmpxchg.org, mhocko@suse.com, guro@fb.com, shakeelb@google.com, akpm@linux-foundation.org, corbet@lwn.net Cc: shy828301@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] doc: memcontrol: add description for oom_kill Date: Thu, 25 Feb 2021 18:12:54 -0800 Message-Id: <20210226021254.3980-1-shy828301@gmail.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When debugging an oom issue, I found the oom_kill counter of memcg is confusing. At the first glance without checking document, I thought it just counts for memcg oom, but it turns out it counts both global and memcg oom. The cgroup v2 documents it, but the description is missed for cgroup v1. Signed-off-by: Yang Shi --- Documentation/admin-guide/cgroup-v1/memory.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/admin-guide/cgroup-v1/memory.rst b/Documentation/admin-guide/cgroup-v1/memory.rst index 0936412e044e..44d5429636e2 100644 --- a/Documentation/admin-guide/cgroup-v1/memory.rst +++ b/Documentation/admin-guide/cgroup-v1/memory.rst @@ -851,6 +851,9 @@ At reading, current status of OOM is shown. (if 1, oom-killer is disabled) - under_oom 0 or 1 (if 1, the memory cgroup is under OOM, tasks may be stopped.) + - oom_kill integer counter + The number of processes belonging to this cgroup killed by any + kind of OOM killer. 11. Memory Pressure =================== -- 2.26.2