Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751878AbeAHVLw (ORCPT + 1 other); Mon, 8 Jan 2018 16:11:52 -0500 Received: from mail-pg0-f43.google.com ([74.125.83.43]:45272 "EHLO mail-pg0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752103AbeAHVLu (ORCPT ); Mon, 8 Jan 2018 16:11:50 -0500 X-Google-Smtp-Source: ACJfBos25tEPwg9Qmxp4J53mhnaaBu695NQzrNQ7pem94imsAC8RRaKywkl/nnxg8aHcQGK6g2ERlA== Cc: mtk.manpages@gmail.com, "Serge E. Hallyn" , Tejun Heo , linux-man , lkml , cgroups@vger.kernel.org To: Roman Gushchin From: "Michael Kerrisk (man-pages)" Subject: cgroups(7): documenting /sys/kernel/cgroup files Message-ID: Date: Mon, 8 Jan 2018 22:11:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: Hello Roman, I wrote cgroups(7) text below to document the files added by you in Linux 4.15. Could you let me know if the following text is okay please: /sys/kernel/cgroup files /sys/kernel/cgroup/delegate (since Linux 4.15) This file exports a list of the cgroups v2 files (one per line) that are delegatable (i.e., whose ownership should be changed to the user ID of the delegatee). In the future, the set of delegatable files may change or grow, and this file provides a way for the kernel to inform user-space applications of which files must be delegated. As at Linux 4.15, one sees the following when inspecting this file: $ cat /sys/kernel/cgroup/delegate cgroup.procs cgroup.subtree_control /sys/kernel/cgroup/features (since Linux 4.15) Over time, the set of cgroups v2 features that are provided by the kernel may change or grow, or some features may not be enabled by default. This file provides a way for user- space applications to discover what features the running kernel supports or has enabled. Features are listed one per line: $ cat /sys/kernel/cgroup/features nsdelegate The entries that can appear in this file are: nsdelegate (since Linux 4.15) The kernel supports the nsdelegate mount option. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/