From mboxrd@z Thu Jan 1 00:00:00 1970 From: Li Zefan Subject: Re: [PATCHSET cgroup/for-3.15] cgroup: prepare for the default unified hierarchy Date: Tue, 18 Mar 2014 11:55:07 +0800 Message-ID: <5327C39B.10408@huawei.com> References: <1394740213-17626-1-git-send-email-tj@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1394740213-17626-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii" To: Tejun Heo Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org On 2014/3/14 3:50, Tejun Heo wrote: > Hello, > > The planned unified hierarchy is just around the corner. We're gonna > repurpose the dummy hierarchy to serve as the default unified > hierarchy. Controllers which aren't attached to other hierarchies are > already automatically bound to the dummy hierarchy; however, the dummy > hierarchy is minimally initialized during boot and can't currently act > as a full hierarchy. > > This patchset gradually turns the dummy hierarchy into fully > functional default one and makes it mountable via selecting > sane_behavior without any subsystems specified. While this patchset > does make the default hierarchy mountable, the unified hierarchy > functionality isn't implemented yet and cgroup creation in the default > hierarchy is rejected for now. > > This lays down all the boilerplate work for the unified hierarchy. > The next patchset will implement the actual unified functionality. > > This patchset contains the following eleven patches. > > 0001-cgroup-cgroup-subsys-should-be-cleared-after-the-css.patch > 0002-cgroup-relocate-setting-of-CGRP_DEAD.patch > 0003-cgroup-reorganize-cgroup-bootstrapping.patch > 0004-cgroup-use-cgroup_setup_root-to-initialize-cgroup_du.patch > 0005-cgroup-remove-NULL-checks-from-pr_cont_-cgroup_-name.patch > 0006-cgroup-treat-cgroup_dummy_root-as-an-equivalent-hier.patch > 0007-cgroup-move-subsys_mask-from-cgroupfs_root-to-cgroup.patch > 0008-cgroup-rename-cgroup_dummy_root-and-related-names.patch > 0009-cgroup-drop-const-from-buffer-of-cftype-write_string.patch > 0010-cgroup-make-cgrp_dfl_root-mountable.patch > 0011-cgroup-implement-CFTYPE_ONLY_ON_DFL.patch > > 0001-0002 are misc fix / prep. > > 0003-0009 (mostly) turn the dummy hierarchy into a full hierarchy > which takes on controllers which aren't attached to other hierarchies. > > 0010-0011 make the default hierarchy mountable and implement > CFTYPE_ONLY_DFL. > > This patchset is on top of cgroup/for-3.15 b8dadcb58d54 ("cpuset: use > rcu_read_lock() to protect task_cs()"). diffstat follows. > > block/blk-throttle.c | 4 > block/cfq-iosched.c | 4 > include/linux/cgroup.h | 57 ++--- > kernel/cgroup.c | 464 +++++++++++++++++++++++++--------------------- > kernel/cgroup_freezer.c | 2 > kernel/cpuset.c | 2 > mm/hugetlb_cgroup.c | 2 > mm/memcontrol.c | 4 > net/core/netprio_cgroup.c | 2 > net/ipv4/tcp_memcontrol.c | 2 > security/device_cgroup.c | 4 > 11 files changed, 295 insertions(+), 252 deletions(-) > Looks good in general! Acked-by: Li Zefan