diff options
| author | Colin Cross <ccross@android.com> | 2011-10-25 11:34:53 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-10-25 11:34:53 +0800 |
| commit | 9070c959d23189f2b1739589932a8f32387f08e5 (patch) | |
| tree | 7040f7526f7df2429176ef273bda9bb319fcdb05 /include | |
| parent | bd8381e3f85b296cb44bb2c22e5a7c76740a69d9 (diff) | |
cgroup: Set CGRP_RELEASABLE when adding to a cgroup
Changes the meaning of CGRP_RELEASABLE to be set on any cgroup
that has ever had a task or cgroup in it, or had css_get called
on it. The bit is set in cgroup_attach_task, cgroup_create,
and __css_get. It is not necessary to set the bit in
cgroup_fork, as the task is either in the root cgroup, in
which can never be released, or the task it was forked from
already set the bit in croup_attach_task.
Signed-off-by: Colin Cross <ccross@android.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cgroup.h | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index da7e4bc34e8..50a1581e312 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -84,12 +84,6 @@ enum { CSS_REMOVED, /* This CSS is dead */ }; -/* Caller must verify that the css is not for root cgroup */ -static inline void __css_get(struct cgroup_subsys_state *css, int count) -{ - atomic_add(count, &css->refcnt); -} - /* * Call css_get() to hold a reference on the css; it can be used * for a reference obtained via: @@ -97,6 +91,7 @@ static inline void __css_get(struct cgroup_subsys_state *css, int count) * - task->cgroups for a locked task */ +extern void __css_get(struct cgroup_subsys_state *css, int count); static inline void css_get(struct cgroup_subsys_state *css) { /* We don't need to reference count the root state */ @@ -143,10 +138,7 @@ static inline void css_put(struct cgroup_subsys_state *css) enum { /* Control Group is dead */ CGRP_REMOVED, - /* - * Control Group has previously had a child cgroup or a task, - * but no longer (only if CGRP_NOTIFY_ON_RELEASE is set) - */ + /* Control Group has ever had a child cgroup or a task */ CGRP_RELEASABLE, /* Control Group requires release notifications to userspace */ CGRP_NOTIFY_ON_RELEASE, |