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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 72498C433F5 for ; Sat, 9 Apr 2022 01:31:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 100486B0073; Fri, 8 Apr 2022 21:31:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0AFAE6B0074; Fri, 8 Apr 2022 21:31:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EBA116B0075; Fri, 8 Apr 2022 21:31:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.25]) by kanga.kvack.org (Postfix) with ESMTP id DA6EC6B0073 for ; Fri, 8 Apr 2022 21:31:53 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id A56662045E for ; Sat, 9 Apr 2022 01:31:53 +0000 (UTC) X-FDA: 79335614106.05.9D716A1 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf03.hostedemail.com (Postfix) with ESMTP id 2098020005 for ; Sat, 9 Apr 2022 01:31:52 +0000 (UTC) Date: Fri, 8 Apr 2022 18:31:44 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1649467912; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=YgPRA9IbwhjhB6ojYl/45ZaPPvF3Um0EDK8UHb2CIOI=; b=EbSJmw8xApHvvckBi4Kh5FTMI4JilxPBOdvhV8nOE0qfY0MGepSj9lOKIoE0NteAxzJ3Ze RlEpRAZn6RfxH0j5hcNTRzTETxJvjMkXzEzaO1KSLWpBEc+yKyBgbxC+W8waYin+ifCCAm SJku4f083ysW+3H2KckixE4jOV9SET4= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Roman Gushchin To: Yosry Ahmed Cc: Johannes Weiner , Michal Hocko , Shakeel Butt , Andrew Morton , David Rientjes , Tejun Heo , Zefan Li , Jonathan Corbet , Shuah Khan , Yu Zhao , Dave Hansen , Wei Xu , Greg Thelen , Chen Wandun , Vaibhav Jain , Michal =?iso-8859-1?Q?Koutn=FD?= , Tim Chen , cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v3 3/4] selftests: cgroup: fix alloc_anon_noexit() instantly freeing memory Message-ID: References: <20220408045743.1432968-1-yosryahmed@google.com> <20220408045743.1432968-4-yosryahmed@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220408045743.1432968-4-yosryahmed@google.com> X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 2098020005 X-Stat-Signature: tabz4g4rc7ko3gzpkonjykji6bdo6tq4 Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=EbSJmw8x; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf03.hostedemail.com: domain of roman.gushchin@linux.dev designates 188.165.223.204 as permitted sender) smtp.mailfrom=roman.gushchin@linux.dev X-Rspam-User: X-HE-Tag: 1649467912-237440 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Apr 08, 2022 at 04:57:42AM +0000, Yosry Ahmed wrote: > Currently, alloc_anon_noexit() calls alloc_anon() which instantly frees > the allocated memory. alloc_anon_noexit() is usually used with > cg_run_nowait() to run a process in the background that allocates > memory. It makes sense for the background process to keep the memory > allocated and not instantly free it (otherwise there is no point of > running it in the background). > > Signed-off-by: Yosry Ahmed Acked-by: Roman Gushchin