From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 71B552E7F21 for ; Mon, 12 Jan 2026 15:15:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768230927; cv=none; b=XCoUCruzTsb6SyraXoxvt8w5wjogDH+0BlOf9zXMbRY6jKyMT0dmsjOx8LJXufRZ2TdWYwXXdWFIMSH+HJZ/pUqvaxB4xImMf5vsynl17HlROhl8HT0dX+esRYwzUvpVxHN44eYTfhmvDtHYYEAQzXzDIFHomgBwhTIg+A9w4KM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768230927; c=relaxed/simple; bh=UWmSshBEHQ7KxE8MnHPkIfsFEU9/Q6SjGSI/Gge/kD8=; h=From:Message-ID:Date:MIME-Version:Subject:To:Cc:References: In-Reply-To:Content-Type; b=A/3eYOcLfQZCSWcJDuqeXUi2VwxYdvoqwQUbX0j1GEvCfspCTc2kFRTufrgEGcIe8n66E/JATANoUP2ocrj5dixmACZuEpGHj4YhH2V//jN4A6v57jeQSG+PUBIz4tWEwRx7VdX2tZihy7G8OpSfeKLI0VfONIppeqI1AgAPKac= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=DAlSwcgu; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b=ioGvxbv3; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DAlSwcgu"; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b="ioGvxbv3" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1768230925; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yBnEhkF7Qdzoo2GNW/2wAAQ4zQejO2Ma9rGc252Ro1o=; b=DAlSwcguvGD8uf7QUGAI4/pu4jVAJsp7c7370mt2ZQXnsVGjiVGJ+0mNbUo/n2VAjlUIPV bmJ9O3TaTxKl7+STo83mSimtO6jkHyg6ITQocu22hu1Zzcd3t0RlYPOdkTDaqD1J8Bwiq8 UyM3RNLUWsYsAGTYQxoVuT5KPnaH5WE= Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-520-LJ2-H7LSOeKuh5OP-xCcrw-1; Mon, 12 Jan 2026 10:15:21 -0500 X-MC-Unique: LJ2-H7LSOeKuh5OP-xCcrw-1 X-Mimecast-MFC-AGG-ID: LJ2-H7LSOeKuh5OP-xCcrw_1768230921 Received: by mail-qv1-f72.google.com with SMTP id 6a1803df08f44-88a366fa140so197471966d6.1 for ; Mon, 12 Jan 2026 07:15:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1768230921; x=1768835721; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:content-language:references :cc:to:subject:user-agent:mime-version:date:message-id:from:from:to :cc:subject:date:message-id:reply-to; bh=yBnEhkF7Qdzoo2GNW/2wAAQ4zQejO2Ma9rGc252Ro1o=; b=ioGvxbv3KePlaaSTy5wqTAqfaMPBb7jFEBOvmyp1gXHqCeS6U7WOtjPN+HGMDrEI4V p6FfEQy1kafw0OI9oqueCm7CMl4tFj6NByWvaFm07qVReKjisc/pDAl9pFvmtL7qK3BT Ck8zDj8dk4i6RUTc17Uc2lU5hB3hMb+035RVg3LnvSX6xHyQwdvg6MFpKA2/luEQ0pFg h5Luum8SQ40G05TbtnelPwm+XVQ6K/mCG1jBdlnt3yroW3Hquyj7MqpF9wBshxuygRWL MnWrGsHolYYrJfZj5ZAYMneMzUqob4EHAE00kRblHCg9XKvS/vaG1EkrcJtS1vx+Qdyp 1lHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768230921; x=1768835721; h=content-transfer-encoding:in-reply-to:content-language:references :cc:to:subject:user-agent:mime-version:date:message-id:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=yBnEhkF7Qdzoo2GNW/2wAAQ4zQejO2Ma9rGc252Ro1o=; b=eT59ecQTrO9ZxEx9S00rObWj+XgHqCVRWKUZJ4jva5ghf14asXiZ7+NQTbf6fGwJcL SDhQ/j7ARW687Ft/5Pa3kNoIRbQBAxzsNRaty9ASUD5sCld9vnXfn2UlOSr3xPIfdQdP p91hqhcBDXJ5758JFjc30Wj1q/Q7z86Mcm7J1Ai7ECm3PzvyIB0H47YhbQokJViOmnXc tJJ7LnifEEiBwjT4E7/l1Dm2Fs9pc0eHTGZGCA2WSTLlJKoo5i70wfqgTCuLIE4lR/Uv AzBjBtJExoMXPsI1r3fCkklZCot/GwGacEy9OTnNbFVlgjyoe5Mm/7ySVUxCLWMIMSyc p03w== X-Forwarded-Encrypted: i=1; AJvYcCV2+LMzpyiRJN23NieKKdxWXc5ZPmDwl8x7xRsJRL3/Y4cSAMF1qAqFyjL8R15th+OmaRr0gB3jcNMmdXk=@vger.kernel.org X-Gm-Message-State: AOJu0YyK4P/AFx02m4NcBc0excEGwTqR3PX7OugqD6f9iHz3ICN6s4q4 8IBF6y1kywtVoD/kDMupaTNoSj3lq98eybJ8VDzGgs6uZwiV25h8qe6kPik04kPt5ZRhgPr3z/g I10TNwOr/bMP5QFSStZLXaeujVGyWCI2CxN0Ilp/nlNUFDjs6ftiWcjnB437wKtCw/Q== X-Gm-Gg: AY/fxX5ugZNKXHaDNm6tQcLise+A03jt4NjtgOe3yBmxMCKQ8T27iBUEVHQdBSAZnRA xmXFml36yREIu6wU16C/UCJBKwipSHAPC+nt2pIA1fPtGR3oh9U1vthqDzr8FZgKB8iO1GzssAg Zt65D/B00vbxdY7yVth/rIrESunfS8wfEXsRIJhTjkrt2NTc3YuI658c0E+JsUkCaPFRie+3kDk Mp2MUFla0iilyzrLrXDdRR7b9DATl+F6z45Ry3+nQA0nsi9fsvh/fQqZK15hwZ2Ov8k+mbni3MU h4csRnaoWQFp0nS7m/JTSmRMFKTChRCdDkJVqLvhMry0yjddJ3iNvLBsMEaZ1bCsmvXTRcLv5ck OEG5TpfSMTnozrW48PlF2+g+CczFCmyGNzo80g+dYiz960vEg9R4hfqb/ X-Received: by 2002:ad4:5b87:0:b0:87f:e1b3:2014 with SMTP id 6a1803df08f44-890842d60cdmr242991946d6.66.1768230920865; Mon, 12 Jan 2026 07:15:20 -0800 (PST) X-Google-Smtp-Source: AGHT+IEEEvjOnKFKxOB5sHeF3FHbEdls66ozWBRKEY9iiOUfJDVYVV2wAJMexcKiVyLElIE1U7IUUw== X-Received: by 2002:ad4:5b87:0:b0:87f:e1b3:2014 with SMTP id 6a1803df08f44-890842d60cdmr242991006d6.66.1768230920201; Mon, 12 Jan 2026 07:15:20 -0800 (PST) Received: from ?IPV6:2601:188:c102:b180:1f8b:71d0:77b1:1f6e? ([2601:188:c102:b180:1f8b:71d0:77b1:1f6e]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-89077253218sm137736816d6.43.2026.01.12.07.15.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Jan 2026 07:15:19 -0800 (PST) From: Waiman Long X-Google-Original-From: Waiman Long Message-ID: <9a1b7583-7695-484f-a290-807b6db06799@redhat.com> Date: Mon, 12 Jan 2026 10:15:17 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH cgroup/for-6.20 v4 4/5] cgroup/cpuset: Don't invalidate sibling partitions on cpuset.cpus conflict To: =?UTF-8?Q?Michal_Koutn=C3=BD?= , Waiman Long Cc: Tejun Heo , Johannes Weiner , Jonathan Corbet , Shuah Khan , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, Sun Shaojie , Chen Ridong , Chen Ridong References: <20260112040856.460904-1-longman@redhat.com> <20260112040856.460904-5-longman@redhat.com> <2naek52bbrod4wf5dbyq2s3odqswy2urrwzsqxv3ozrtugioaw@sjw5m6gizl33> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 1/12/26 10:08 AM, Michal Koutný wrote: > On Mon, Jan 12, 2026 at 09:51:28AM -0500, Waiman Long wrote: >> Sorry, I might have missed this comment of yours. The >> "cpuset.cpus.exclusive" file lists all the CPUs that can be granted to its >> children as exclusive CPUs. The cgroup root is an implicit partition root >> where all its CPUs can be granted to its children whether they are online or >> offline. "cpuset.cpus.effective" OTOH ignores the offline CPUs as well as >> exclusive CPUs that have been passed down to existing descendant partition >> roots so it may differ from the implicit "cpuset.cpus.exclusive". > Howewer, there's no "cpuset.cpus" configurable nor visible on the root > cgroup. So possibly drop this hunk altogether for simplicity? Ah, you are right. I thought there was a read-only copy in cgroup root. Will correct that. Thanks, Longman