BMC/Intel-BMC/linux.git/include/linux/cgroup.h, branch v4.2

Merge branch 'for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2015-06-27T02:50:04+00:00

Pull cgroup updates from Tejun Heo: - threadgroup_lock got reorganized so that its users can pick the actual locking mechanism to use. Its only user - cgroups - is updated to use a percpu_rwsem instead of per-process rwsem. This makes things a bit lighter on hot paths and allows cgroups to perform and fail multi-task (a process) migrations atomically. Multi-task migrations are used in several places including the unified hierarchy. - Delegation rule and documentation added to unified hierarchy. This will likely be the last interface update from the cgroup core side for unified hierarchy before lifting the devel mask. - Some groundwork for the pids controller which is scheduled to be merged in the coming devel cycle. * 'for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: add delegation section to unified hierarchy documentation cgroup: require write perm on common ancestor when moving processes on the default hierarchy cgroup: separate out cgroup_procs_write_permission() from __cgroup_procs_write() kernfs: make kernfs_get_inode() public MAINTAINERS: add a cgroup core co-maintainer cgroup: fix uninitialised iterator in for_each_subsys_which cgroup: replace explicit ss_mask checking with for_each_subsys_which cgroup: use bitmask to filter for_each_subsys cgroup: add seq_file forward declaration for struct cftype cgroup: simplify threadgroup locking sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem sched, cgroup: reorganize threadgroup locking cgroup: switch to unsigned long for bitmasks cgroup: reorganize include/linux/cgroup.h cgroup: separate out include/linux/cgroup-defs.h cgroup: fix some comment typos

cgroup, block: implement task_get_css() and use it in bio_associate_current()

2015-06-02T14:33:34+00:00

bio_associate_current() currently open codes task_css() and css_tryget_online() to find and pin $current's blkcg css. Abstract it into task_get_css() which is implemented from cgroup side. As a task is always associated with an online css for every subsystem except while the css_set update is propagating, task_get_css() retries till css_tryget_online() succeeds. This is a cleanup and shouldn't lead to noticeable behavior changes. Signed-off-by: Tejun Heo Cc: Li Zefan Cc: Jens Axboe Cc: Vivek Goyal Signed-off-by: Jens Axboe

cgroup: reorganize include/linux/cgroup.h

2015-05-18T19:52:20+00:00

From c4d440938b5e2015c70594fe6666a099c844f929 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 13 May 2015 16:21:40 -0400 Over time, cgroup.h grew organically and doesn't have much logical structure at this point. Separation of cgroup-defs.h in the previous patch gives us a good chance for reorganizing cgroup.h as changes to the header are likely to cause conflicts anyway. This patch reorganizes cgroup.h so that it has consistent logical grouping. This is pure reorganization. v2: Relocating #ifdef CONFIG_CGROUPS caused build failure when cgroup is disabled. Dropped. Signed-off-by: Tejun Heo

cgroup: separate out include/linux/cgroup-defs.h

2015-05-18T19:52:16+00:00

From 2d728f74bfc071df06773e2fd7577dd5dab6425d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 13 May 2015 15:37:01 -0400 This patch separates out cgroup-defs.h from cgroup.h which has grown a lot of dependencies. cgroup-defs.h currently only contains constant and type definitions and can be used to break circular include dependency. While moving, definitions are reordered so that cgroup-defs.h has consistent logical structure. This patch is pure reorganization. Signed-off-by: Tejun Heo

cgroup: add dummy css_put() for !CONFIG_CGROUPS

2015-01-06T17:02:46+00:00

This will later be depended upon by the scheduled cgroup writeback support. Signed-off-by: Tejun Heo

Merge branch 'for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2014-12-12T02:57:19+00:00

Pull cgroup update from Tejun Heo: "cpuset got simplified a bit. cgroup core got a fix on unified hierarchy and grew some effective css related interfaces which will be used for blkio support for writeback IO traffic which is currently being worked on" * 'for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: implement cgroup_get_e_css() cgroup: add cgroup_subsys->css_e_css_changed() cgroup: add cgroup_subsys->css_released() cgroup: fix the async css offline wait logic in cgroup_subtree_control_write() cgroup: restructure child_subsys_mask handling in cgroup_subtree_control_write() cgroup: separate out cgroup_calc_child_subsys_mask() from cgroup_refresh_child_subsys_mask() cpuset: lock vs unlock typo cpuset: simplify cpuset_node_allowed API cpuset: convert callback_mutex to a spinlock

Merge branch 'akpm' (patchbomb from Andrew)

2014-12-11T02:34:42+00:00

Merge first patchbomb from Andrew Morton: - a few minor cifs fixes - dma-debug upadtes - ocfs2 - slab - about half of MM - procfs - kernel/exit.c - panic.c tweaks - printk upates - lib/ updates - checkpatch updates - fs/binfmt updates - the drivers/rtc tree - nilfs - kmod fixes - more kernel/exit.c - various other misc tweaks and fixes * emailed patches from Andrew Morton : (190 commits) exit: pidns: fix/update the comments in zap_pid_ns_processes() exit: pidns: alloc_pid() leaks pid_namespace if child_reaper is exiting exit: exit_notify: re-use "dead" list to autoreap current exit: reparent: call forget_original_parent() under tasklist_lock exit: reparent: avoid find_new_reaper() if no children exit: reparent: introduce find_alive_thread() exit: reparent: introduce find_child_reaper() exit: reparent: document the ->has_child_subreaper checks exit: reparent: s/while_each_thread/for_each_thread/ in find_new_reaper() exit: reparent: fix the cross-namespace PR_SET_CHILD_SUBREAPER reparenting exit: reparent: fix the dead-parent PR_SET_CHILD_SUBREAPER reparenting exit: proc: don't try to flush /proc/tgid/task/tgid exit: release_task: fix the comment about group leader accounting exit: wait: drop tasklist_lock before psig->c* accounting exit: wait: don't use zombie->real_parent exit: wait: cleanup the ptrace_reparented() checks usermodehelper: kill the kmod_thread_locker logic usermodehelper: don't use CLONE_VFORK for ____call_usermodehelper() fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races ...

mm: memcontrol: take a css reference for each charged page

2014-12-11T01:41:05+00:00

Charges currently pin the css indirectly by playing tricks during css_offline(): user pages stall the offlining process until all of them have been reparented, whereas kmemcg acquires a keep-alive reference if outstanding kernel pages are detected at that point. In preparation for removing all this complexity, make the pinning explicit and acquire a css references for every charged page. Signed-off-by: Johannes Weiner Reviewed-by: Vladimir Davydov Acked-by: Michal Hocko Cc: David Rientjes Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kill f_dentry uses

2014-11-19T18:01:25+00:00

Signed-off-by: Al Viro

cgroup: implement cgroup_get_e_css()

2014-11-18T07:49:52+00:00

Implement cgroup_get_e_css() which finds and gets the effective css for the specified cgroup and subsystem combination. This function always returns a valid pinned css. This will be used by cgroup writeback support. While at it, add comment to cgroup_e_css() to explain why that function is different from cgroup_get_e_css() and has to test cgrp->child_subsys_mask instead of cgroup_css(cgrp, ss). Signed-off-by: Tejun Heo Acked-by: Zefan Li