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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 AC5DCCA9EBC for ; Thu, 24 Oct 2019 19:08:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8481F21925 for ; Thu, 24 Oct 2019 19:08:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571944100; bh=yvt8z9YMbzAp3WdGAfs36TO7W+oiz8lWwigWtb8/g6I=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=yXOPrDIrYUjEf2x9lzvnylYDcb3suKevhylWTlT3LuVWU9kPEtOCn3Y/0FUYBq0qX jY7o7dJOmuf0vn+IMsI6JsVyGc3fNujsP32wlrYZq0clpKrSY2GXmgzvXUxdqQxAxX WocnmBZlu3NS+W8PBeGsIPGrGm7dMaKMa/+Az/lM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406500AbfJXTIT (ORCPT ); Thu, 24 Oct 2019 15:08:19 -0400 Received: from mail-qk1-f193.google.com ([209.85.222.193]:46737 "EHLO mail-qk1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390450AbfJXTIT (ORCPT ); Thu, 24 Oct 2019 15:08:19 -0400 Received: by mail-qk1-f193.google.com with SMTP id e66so24446690qkf.13; Thu, 24 Oct 2019 12:08:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=cygSBSpbxOoz5DLta9pK9Fq8puzT/3arKPoGzp7XpzU=; b=uE+qV49XGr9hRYWnRoYqjv9vLqOEO1EcgYE+0tCeTsALBbePUu/hwpaNU4ffUZ1NWA LTbQ4vzlv66zSjjBMKaJ22ZpO41SzamYUkbAF1UiGVQXGodtZ8gRY00PAoOZ7T+kjEDm MNuWp+B01XnRIt2dTdeAK5ItWsPfeeaKands4plWQeR4KAH2ocQDPnyZbOTI/gPUEzDG 9StD8w+esdZ8V5yFJXKy0JOZHNucUcWOB82VPa/e3kGsA6HhDh5hW4/hGxppi6z4t3tA Aw953Z+iso0hlCo9AlAkPMOP6zR+BtWewsRS2irIZONjwFIxBeDsV+ZkYZbuei8Whmzz F+Ow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=cygSBSpbxOoz5DLta9pK9Fq8puzT/3arKPoGzp7XpzU=; b=EWtHkWs7s1m98RKsUxcG3iVn/2stasPcDyAv5d2xUKfbZX4lY2IN63TX3gHUr0XXao 0/LzeKCzJjNEIN14tc0nZf/ZjrDTZg4+bqgE3gD9fE1Y2s8oz6zFr16xFhQROdcQKNS8 3qyKOwiI37vXXIcrV+Q4C4sHHQ8VHmxY/xjbsR8taznzokMsKu1RfphvkHVIg7FahDoJ G+ae30KSxYwaML660PqypZzGRWzPXP9GZqPxuH7lR5dXCti4gCgklUvBUwCz/hLEmor6 xdrbYifFBZCGhvDW/O1RbJ6HaG9wBBZylNjSIGTASD4ZIBhOgBE96nfQWKGLYaFUf0qZ aDCg== X-Gm-Message-State: APjAAAWHUvTuYhnG96Rgq4gLoIh0VSuxcba4BobGpdb3beO8wAoN8GU0 wK5CR8UATbPBm7oSfnS27d8= X-Google-Smtp-Source: APXvYqyUYYXXkr0LH1H3OtchLwpaqY+XCadnSUP+BdTePoYf4EQhtXfgOCR2J+7JMMs9bXVaQIg1rQ== X-Received: by 2002:ae9:e513:: with SMTP id w19mr8115731qkf.308.1571944097904; Thu, 24 Oct 2019 12:08:17 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::3:b2e]) by smtp.gmail.com with ESMTPSA id z5sm2247670qkc.136.2019.10.24.12.08.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 24 Oct 2019 12:08:17 -0700 (PDT) Date: Thu, 24 Oct 2019 12:08:15 -0700 From: Tejun Heo To: Aleksa Sarai Cc: Li Zefan , Johannes Weiner , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2] cgroup: pids: use atomic64_t for pids->limit Message-ID: <20191024190815.GE3622521@devbig004.ftw2.facebook.com> References: <20191016155001.13651-1-cyphar@cyphar.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191016155001.13651-1-cyphar@cyphar.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 17, 2019 at 02:50:01AM +1100, Aleksa Sarai wrote: > Because pids->limit can be changed concurrently (but we don't want to > take a lock because it would be needlessly expensive), use atomic64_ts > instead. > > Fixes: commit 49b786ea146f ("cgroup: implement the PIDs subsystem") > Cc: stable@vger.kernel.org # v4.3+ > Signed-off-by: Aleksa Sarai Applied to cgroup/for-5.5. Thanks. -- tejun