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 EFD59C433EF for ; Fri, 21 Jan 2022 15:57:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351454AbiAUP5J (ORCPT ); Fri, 21 Jan 2022 10:57:09 -0500 Received: from smtp-out2.suse.de ([195.135.220.29]:55052 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350816AbiAUP5I (ORCPT ); Fri, 21 Jan 2022 10:57:08 -0500 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id D333B1F3CA; Fri, 21 Jan 2022 15:57:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1642780626; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iC6HlJNGkj7g2fm9s+Lr372ZTXnke169KUBr6T9jAO8=; b=ZNv1nepTtadpjK+r7+JhnENvQ6TcqTpdwfnTtrIiHTVFtTqy4jVVmzuSRhdWIUpSZSa8aA +4PPzQVCBYGQ/Eate+TkuHoSkREYhXKdrjqDMHkAvQWcvteVPpx0svJ2Zj40GDAwoytb8k MBO/d/1QMWW39ZUAiejRHNbYnRApeao= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id AC1BD13A1E; Fri, 21 Jan 2022 15:57:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id bEdzKdLX6mHvEwAAMHmgww (envelope-from ); Fri, 21 Jan 2022 15:57:06 +0000 Date: Fri, 21 Jan 2022 16:57:05 +0100 From: Michal =?iso-8859-1?Q?Koutn=FD?= To: Zhang Qiao Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, tj@kernel.org, lizefan.x@bytedance.com, hannes@cmpxchg.org, matthltc@us.ibm.com, bblum@google.com, menage@google.com, akpm@linux-foundation.org, longman@redhat.com, zhaogongyi@huawei.com Subject: Re: [PATCH] cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug Message-ID: <20220121155705.GA2394@blackbody.suse.cz> References: <20220121101210.84926-1-zhangqiao22@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20220121101210.84926-1-zhangqiao22@huawei.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 21, 2022 at 06:12:10PM +0800, Zhang Qiao wrote: > Fixes: be367d099270 ("cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time") What a deep stratigraphy (not sure if it's this one but anything else would likely come from eras ago too). > Reported-by: Zhao Gongyi > Signed-off-by: Zhang Qiao > --- > kernel/cgroup/cpuset.c | 2 ++ > 1 file changed, 2 insertions(+) Feel free to include Reviewed-by: Michal Koutný