user/sven/linux.git/include/linux/cgroup.h, branch v4.0

cgroup: add dummy css_put() for !CONFIG_CGROUPS

2015-01-06T17:02:46Z

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

2014-12-12T02:57:19Z

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)

2014-12-11T02:34:42Z

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

2014-12-11T01:41:05Z

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

2014-11-19T18:01:25Z

Signed-off-by: Al Viro

cgroup: implement cgroup_get_e_css()

2014-11-18T07:49:52Z

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

cgroup: add cgroup_subsys->css_e_css_changed()

2014-11-18T07:49:51Z

Add a new cgroup_subsys operatoin ->css_e_css_changed(). This is invoked if any of the effective csses seen from the css's cgroup may have changed. This will be used to implement cgroup writeback support. Signed-off-by: Tejun Heo Acked-by: Zefan Li

cgroup: add cgroup_subsys->css_released()

2014-11-18T07:49:51Z

Add a new cgroup subsys callback css_released(). This is called when the reference count of the css (cgroup_subsys_state) reaches zero before RCU scheduling free. Signed-off-by: Tejun Heo Acked-by: Zefan Li

cgroup: remove CGRP_RELEASABLE flag

2014-09-19T13:29:32Z

We call put_css_set() after setting CGRP_RELEASABLE flag in cgroup_task_migrate(), but in other places we call it without setting the flag. I don't see the necessity of this flag. Moreover once the flag is set, it will never be cleared, unless writing to the notify_on_release control file, so it can be quite confusing if we look at the output of debug.releasable. # mount -t cgroup -o debug xxx /cgroup # mkdir /cgroup/child # cat /cgroup/child/debug.releasable 0 <-- shows 0 though the cgroup is empty # echo $$ > /cgroup/child/tasks # cat /cgroup/child/debug.releasable 0 # echo $$ > /cgroup/tasks && echo $$ > /cgroup/child/tasks # cat /proc/child/debug.releasable 1 <-- shows 1 though the cgroup is not empty This patch removes the flag, and now debug.releasable shows if the cgroup is empty or not. Signed-off-by: Zefan Li Signed-off-by: Tejun Heo

cgroup: remove redundant check in cgroup_ino()

2014-09-19T13:16:23Z

After we implemented default unified hierarchy, cgrp->kn can never be NULL. Signed-off-by: Zefan Li Signed-off-by: Tejun Heo