From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752400AbbDACbm (ORCPT ); Tue, 31 Mar 2015 22:31:42 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:33720 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751178AbbDACbk (ORCPT ); Tue, 31 Mar 2015 22:31:40 -0400 From: Aleksa Sarai To: tj@kernel.org, lizefan@huawei.com, mingo@redhat.com, peterz@infradead.org Cc: richard@nod.at, fweisbec@gmail.com, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, Aleksa Sarai Subject: [PATCH v7 0/4] cgroups: add pids subsystem Date: Wed, 1 Apr 2015 13:31:26 +1100 Message-Id: <1427855490-5280-1-git-send-email-cyphar@cyphar.com> X-Mailer: git-send-email 2.3.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a futher revised version of the pids v6 patchset[1]. The main changes include: * Actually separate the subsystem callback bitmasks for use with for_each_subsys_which(needs_*_callback, ...). Also switch from the usage of explicit ss_mask checking with for_each_subsys() with for_each_subsys_which(). * Pass an opaque cgroup_fork_state structure between the cgroup_{can,cancel,post}_fork hooks which stores the current task_struct's css_set. The refcount bumping and dropping is handled within cgroup_cfs_{get,put}() respectively. This is done so that the internal implementation of cgroup_fork_state is not exposed to copy_process(), while also allowing the caller to decide when they want to snapshot the current css_set. * Fix a bug where migrating a task between cgroup hierachies would not decrement pids.counter in the source hierarchy. This would cause limits to be enforced prematurely due to residual charges on the pid counter. This is done by adding a detach() callback that alerts a subsystem to a task detaching from it. [1]: https://lkml.org/lkml/2015/3/14/2 Aleksa Sarai (4): cgroups: use bitmask to filter for_each_subsys cgroups: replace explicit ss_mask checking with for_each_subsys_which cgroups: allow a cgroup subsystem to reject a fork cgroups: implement the PIDs subsystem include/linux/cgroup.h | 42 +++++- include/linux/cgroup_subsys.h | 4 + init/Kconfig | 16 +++ kernel/Makefile | 1 + kernel/cgroup.c | 244 ++++++++++++++++++++++++++------- kernel/cgroup_pids.c | 310 ++++++++++++++++++++++++++++++++++++++++++ kernel/fork.c | 38 +++++- 7 files changed, 596 insertions(+), 59 deletions(-) create mode 100644 kernel/cgroup_pids.c -- 2.3.4