From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (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 EC269199939; Wed, 28 May 2025 17:37:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748453866; cv=none; b=cwMuSgfxPr7mY5XHw37xbKHNRmLU7+LODp3+l0NgUnDykF/ZA8/LtsFAGsIn8le2YfFm8muZU8zRyqO1XBjd+eFDwmnOYYyj0tEH/OoOhNMcEb/TOXSTi24A48gfS3RjpZmA9l2fmwTPQ2Cy0HFngJ1IhMgGbUew5a5wbwE4is0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748453866; c=relaxed/simple; bh=CIw7ASx2rLLyfF4nLng8it7E4a96P952Wi8WzNEa/lo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Uz9TtoNJu3/f/T6jBoijX+9Oj5sbtyLzeZCKrGAAJvWVVaoZIuw2kMZ13YyQzGljh66Adv2VGbwAq0YGsJ6LaK331kyNHaFp5P5VUXXSdCbPOK8TJHVsh5cPLAmvuM1qElW4CqwGHSVJH2ssqZcF9rdyQoS9A5BiFyDWA8zcRig= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=G9c10NYO; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="G9c10NYO" Received: from pps.filterd (m0360083.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 54SE9QQT022351; Wed, 28 May 2025 17:37:38 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=pp1; bh=mrve+4iTNvB6RRvFk7zMr+O7LxdCHK vtxs8I5e3L/hk=; b=G9c10NYO66vBWrcZrkMb9iJ8J5ZZXsUTuFZBq+SOSmIB60 +aqlIH4G2md28bkpIT85E5MDInp9IZzgYV6D2RuF5y5CT77TW2Udl+LlDpXra4+L voI2GETWLFElLjgTh3Z23cHNabo6ACjLIAoT1xK88FwBzKzu1tKW96eZgAAj5Ibn FIXzMXKlKGPXKAaaEwY4qfbe0boXL4ocb8hY3whfXY6H3miSkWX9Y06xvYfMr3oc YmcXGiJpeyibEeukCcD6LTqeVIKaIHhp2ifVCDcgKDxPAEbqElwwVMHRxKuJU6Xv FuTFGlq3R9Vovy1Yo0TcpyQFGxSrYJ9dbGBwB5dA== Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 46x40k93d8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 May 2025 17:37:38 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 54SF8RNi016192; Wed, 28 May 2025 17:37:36 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 46uru0rq0e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 May 2025 17:37:36 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 54SHbY7n32899668 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 28 May 2025 17:37:34 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6DACC2004B; Wed, 28 May 2025 17:37:34 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3883120043; Wed, 28 May 2025 17:37:32 +0000 (GMT) Received: from linux.ibm.com (unknown [9.124.209.136]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTPS; Wed, 28 May 2025 17:37:31 +0000 (GMT) Date: Wed, 28 May 2025 23:07:29 +0530 From: Vishal Chourasia To: Waiman Long Cc: Tejun Heo , Johannes Weiner , Michal =?iso-8859-1?Q?Koutn=FD?= , Jonathan Corbet , cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Documentation: cgroup: clarify controller enabling semantics Message-ID: References: <20250527085335.256045-2-vishalc@linux.ibm.com> <99be9c8e-a5c4-4378-b03b-2af01608de9f@redhat.com> Precedence: bulk X-Mailing-List: linux-doc@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: X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 07MnXplC8qaEHDlvpX1_ZIA1E6zqfb5m X-Authority-Analysis: v=2.4 cv=fuPcZE4f c=1 sm=1 tr=0 ts=683749e2 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=kj9zAlcOel0A:10 a=dt9VzEwgFbYA:10 a=2OsMLQx6joTeCsTfgE4A:9 a=CjuIK1q_8ugA:10 X-Proofpoint-GUID: 07MnXplC8qaEHDlvpX1_ZIA1E6zqfb5m X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTI4MDE1MiBTYWx0ZWRfX9zkU4XEbjh8o JeGFIAZEBJcq0ASzKm8jLkdwab5KvMty0iJti1K3nSCnD5GFJq78ZU51jM0KlzNm4MXQXMMtLer m2OQjb8CzNbojh3RyXOcC64BRVwZXODdHnYUiOalljVOsgNKor9wFyO/Y4aFWIEgY+C2H1Ha9gr 8RMIJT2qkIBd5GdpxPacalNr4xA84+pVSMexyvS7yeUpaAgO92UKZ8or8q49I0KcyaiyKrB3COL FJmyi3iIiBWnq7cEres1VrAoKf8m8ztQUnLnZZCI8FOMgmXhf4fvv2mh7t95DFGl5ygPOqLUo+o rlUW1PITuH/p7oybpFhPimsDwsVwWjO43Ucy8WBs/bOCeUeLWD+HXrZqWm8Dn+xm88wGW1Wk7Vd Qss8JYmCLMW9MylplkGo3IaXMdZeaNti6Es21OOswumpH5zukUVuHE9ALdRa6ItK3VsiaqkF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-28_08,2025-05-27_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 suspectscore=0 mlxlogscore=346 priorityscore=1501 malwarescore=0 mlxscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 adultscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505160000 definitions=main-2505280152 Hi Longman, On Wed, May 28, 2025 at 11:45:29AM -0400, Waiman Long wrote: > > On 5/28/25 11:23 AM, Waiman Long wrote: > > I believe breaking the sentence into two separate components > > is actually making it less correct. There are implicit > > controllers that are always enabled and do not show up in > > cgroup.controllers. Prime examples are perf_event and > > freezer. IOW, only controllers that are available and need > > to be explicitly enabled will show up. > > A correction: The cgroup.controllers file shows the controllers > that are available in the current cgroup and which have to be > explicitly enabled in cgroup.subtree_control to make them > available in the child cgroups. Thank you for pointing it out. Vishal > > Cheers, > Longman >