From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 95300188927; Thu, 12 Sep 2024 05:59:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726120789; cv=none; b=EM5slDdUw7wG/h+LSmIpZeO+SXtF0nR3nuSXBT/RNJDUdNRMf92KMB8eRKykUJJSjrvtyuOyY6Xnc9/763sdHu2qadfQnBYv5gi748jyISDZ+nKjUDgbrhRQy7VaENG904XJQJQE3Zqz7VRuhmARvHrDTsqXZ+3X0MYA8mY4/j8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726120789; c=relaxed/simple; bh=pdGCoDLFknytFHxTBZchFqbIFEPSKZ3Zw/2AcW44moI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dDgYKep+aGmAzaGmp8wwAam6ul4pGIkbDoovxoDj335KQcPiQkcr5WEzre1P4xcsOfNkYXGCqJkLcDgBSoJI6ieqPNY7H6WAqVegPx45unklPwtNtmW2HW62FZZ6P7N09t75Hg4PjTFqJB1Ynv3dUjrS0r26nyPQnFet68/StM0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hX/tlpSC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hX/tlpSC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E54C8C4CEC3; Thu, 12 Sep 2024 05:59:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726120789; bh=pdGCoDLFknytFHxTBZchFqbIFEPSKZ3Zw/2AcW44moI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hX/tlpSCw22C5Ky+HJ5qpqOQ2efapTaR1qLD0HzzH3EKyTmmt3FgxC2ANKfF81WZd H6ZJhBApc6Ks5hlOrhiAUYmpRhr73yimCgyJ3llNHzbACgCoJzDCEg4cIIjR9nb2Mp BP8Ci/yji6UH/Uz6g8PnZLjS49piVKCIMZ3ENywKcgtI4UrWRCifGpFvYA5r4oPiYr 1MovcyP5eG3DlNS/5IfUHbuKweg7KwIiV9PzdctnwWSrTfOgcl8BA7QcKqiZp3vSVN rmy19Hh3DE4S/gmZ+wSp2U4PFk80f1Yuh72UKYKXsXP4pPWHywzbdwVRoIpM5S89Fg vshqC6kmwYjPA== Date: Wed, 11 Sep 2024 19:59:48 -1000 From: Tejun Heo To: Chen Ridong Cc: Roman Gushchin , Michal =?iso-8859-1?Q?Koutn=FD?= , Chen Ridong , martin.lau@linux.dev, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, lizefan.x@bytedance.com, hannes@cmpxchg.org, bpf@vger.kernel.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock Message-ID: References: <20240817093334.6062-1-chenridong@huawei.com> <20240817093334.6062-2-chenridong@huawei.com> <07501c67-3b18-48e3-8929-e773d8d6920f@huaweicloud.com> <83cea8c6-d2f8-42f2-990e-80412ebf296e@huaweicloud.com> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <83cea8c6-d2f8-42f2-990e-80412ebf296e@huaweicloud.com> On Thu, Sep 12, 2024 at 09:33:23AM +0800, Chen Ridong wrote: > I will add a patch do document that. > Should we modify WQ_DFL_ACTIVE(256 now)? Maybe 1024 is acceptable? Yeah, let's bump it. Thanks. -- tejun