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[2603:800c:1a02:1bae:a7fa:157f:969a:4cde]) by smtp.gmail.com with ESMTPSA id x14-20020a170902a38e00b0015e8d4eb219sm316845pla.99.2022.08.25.20.17.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Aug 2022 20:17:11 -0700 (PDT) Date: Thu, 25 Aug 2022 17:17:09 -1000 From: Tejun Heo To: Lu Jialin Cc: Zefan Li , Johannes Weiner , Andrew Morton , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Xiu Jianfeng , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC 0/2] Introduce cgroup.top interface Message-ID: References: <20220826011503.103894-1-lujialin4@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220826011503.103894-1-lujialin4@huawei.com> ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1661483833; a=rsa-sha256; cv=none; b=CTUXxw/P6B80GkK1kV9CXAQlDXcagRtXDXCh8Lwo3OKTcMpACpSJKNRo/NAgZzDsMxXxZf OSi/2dooCLujTRmECs0O3iU0ox0Ahv1ePnQfcTdkoLBRVTF1JR7of/a6KU+RSs9FZ3flxq PBJlS4DYAzZ+RmH8b31ufq9edKV2Xpo= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=kN4iQW7K; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=kernel.org (policy=none); spf=pass (imf27.hostedemail.com: domain of htejun@gmail.com designates 209.85.215.171 as permitted sender) smtp.mailfrom=htejun@gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1661483833; h=from:from:sender:sender: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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=MB6QLwte6A+FfeHZ7hhIAgqBcop3yV3R8qqmPiooMZw=; b=u60U6Q1gDOxgkroVmpw0Pnl1vevNOo59Eiz6uNmtQoDC6Dx3zmBs/n1lzSSl8quhJg4EU3 0qNp1aIsHSon9ekyQatk5aDl+lIX21jirIuETE7PyGUL03sBj8+BwuXhcXnOUr2/uZeBTi FD1nh8jmsWaWx7+SoRruKUgVhb1lSoE= Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=kN4iQW7K; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=kernel.org (policy=none); spf=pass (imf27.hostedemail.com: domain of htejun@gmail.com designates 209.85.215.171 as permitted sender) smtp.mailfrom=htejun@gmail.com X-Rspam-User: X-Rspamd-Queue-Id: 0FFF04001F X-Rspamd-Server: rspam08 X-Stat-Signature: t8mw1hzqkc97esej6d7q663jujh3ykkw X-HE-Tag: 1661483832-513407 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, On Fri, Aug 26, 2022 at 09:15:01AM +0800, Lu Jialin wrote: > Cgroup is used to organize and manage resource available processes. > Currently there are no handy tool for gathering reousrce usage > information for each and every child cgroups, makes it hard to detect > resource outage and debug resource issues. > > To overcome this, we present the cgroup.top interface. Just like the > top command, user is able to easily gather resource usage information > , allowing user to detect and respond to resource outage in child > cgroups I don't think this is something we want build into the kernel. Maybe what you want is something similar to below? https://github.com/facebookincubator/below Thanks. -- tejun