TononixOS/ubports_kernel_google_msm
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

cgroup: Set CGRP_RELEASABLE when adding to a cgroup

Browse Source 
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>
This commit is contained in:
Colin Cross
2010-11-23 21:37:03 -08:00
parent e5e483d133
commit c0f6fa8c40
2 changed files with 25 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/linux/cgroup.h
View File

@@ -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,