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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD008C433F5 for ; Sat, 23 Apr 2022 14:03:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236048AbiDWOGa (ORCPT ); Sat, 23 Apr 2022 10:06:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235987AbiDWOGN (ORCPT ); Sat, 23 Apr 2022 10:06:13 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C861692A2 for ; Sat, 23 Apr 2022 07:03:15 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-2f4e28ae604so50161677b3.8 for ; Sat, 23 Apr 2022 07:03:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=fa8nrg7PnSBHWiz/ixAu3+CbgP2gabmfB3kka70Ad0U=; b=RBzRm8aigFAmC2YQq4Au63IrMg4vk5mNEbXU0HTFREh1S8MkXIo2r1//dLE4dyUX/e 6NozTIV4b1f9CJCUnvT4w7Sx7ybqXpLGTEuCwKk4b3Cr+DCdjlOpNBVoS7xw+1IljbxX WY9TJe1wbjl3aDMWyDZjVVUsZQ+WpulkaJM5CwkywnoIXR0oQof2FUp7skcLKtWIfukx VknJtnGg5S6NNilEWi8UYh+oR7TXcfJ/JyaSL8lv6ju9ciyY4p8a1ydjQvkXybSBiEhR MVC/MmsNWdd9lqggkQCwKJIffrY3xA8wW9Gow+xt10wW2staPBbArzYc4Kx+820Ntvm+ KDpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=fa8nrg7PnSBHWiz/ixAu3+CbgP2gabmfB3kka70Ad0U=; b=PUi1QF2KqkoX7aQzjMVugSyBvkiLLHxFtkfbDBMmcmAbxTMWfOJDYVB4tcq3DJQNwU eDBXrgGJb+5uu8wNfc/lvatSWWCd0N1ucoyhRfvhdIGsX5gGBcoJM7ANKAvv10oKyR+h Cd5EuQdGDWFiPZ+d4AQbMw5JRLShFvVZtLBRAgPmoCIEIpHn6oWIAVpKcSJvQ29XmwW+ wvncQy1IVgtQ9evBEZFliVh/DX0OSCfOGMMbusPIHZ810Vm21fS2aiabyvyiL85lStN+ QJROVZDpQB4y9+WCvJnymNMs3fM0w2cnPFw7S6mxmCOiexW+3jW1ST595VneNXjdbgC3 cThw== X-Gm-Message-State: AOAM530kPWDaH5hYfFvPb9SAvXHdGtSxyoKdvktzhI9ImiR5T2kqkJPR OCifpKg8+Fr8QiE34bqzLU0SKjeN1KCECQ== X-Google-Smtp-Source: ABdhPJwStmJpcHiA2mFTxcNMhfws2BRPRjdd+RlFHxUK+bhjIRki3ilpkcFSKTXyuoE3Fh60b9kljL0wiOv+vg== X-Received: from shakeelb.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:28b]) (user=shakeelb job=sendgmr) by 2002:a81:18d7:0:b0:2eb:553e:f3ee with SMTP id 206-20020a8118d7000000b002eb553ef3eemr9135814ywy.393.1650722594556; Sat, 23 Apr 2022 07:03:14 -0700 (PDT) Date: Sat, 23 Apr 2022 14:03:12 +0000 In-Reply-To: <20220421234426.3494842-4-yosryahmed@google.com> Message-Id: <20220423140312.fxsxjwcebvor2x5l@google.com> Mime-Version: 1.0 References: <20220421234426.3494842-1-yosryahmed@google.com> <20220421234426.3494842-4-yosryahmed@google.com> Subject: Re: [PATCH v4 3/4] selftests: cgroup: fix alloc_anon_noexit() instantly freeing memory From: Shakeel Butt To: Yosry Ahmed Cc: Johannes Weiner , Michal Hocko , Andrew Morton , Roman Gushchin , David Rientjes , Tejun Heo , Zefan Li , Jonathan Corbet , Shuah Khan , Yu Zhao , Dave Hansen , Wei Xu , Greg Thelen , Chen Wandun , Vaibhav Jain , "Michal =?utf-8?Q?Koutn=C3=BD?=" , Tim Chen , Dan Schatzberg , cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 21, 2022 at 11:44:25PM +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 Acked-by: Shakeel Butt