Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-16 13:34:30 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

cgroup: add cgroup_subsys->css_released()

Browse Source 
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 <tj@kernel.org>
Acked-by: Zefan Li <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2014-11-18 02:49:51 -05:00
parent db6e305345
commit 7d172cc89b
2 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/cgroup.h
View File

@ -612,6 +612,7 @@ struct cgroup_subsys {
struct cgroup_subsys_state *(*css_alloc)(struct cgroup_subsys_state *parent_css);
int (*css_online)(struct cgroup_subsys_state *css);
void (*css_offline)(struct cgroup_subsys_state *css);
void (*css_released)(struct cgroup_subsys_state *css);
void (*css_free)(struct cgroup_subsys_state *css);
void (*css_reset)(struct cgroup_subsys_state *css);

2
kernel/cgroup.c
View File

@ -4380,6 +4380,8 @@ static void css_release_work_fn(struct work_struct *work)
if (ss) {
/* css release path */
cgroup_idr_remove(&ss->css_idr, css->id);
if (ss->css_released)
ss->css_released(css);
} else {
/* cgroup release path */
cgroup_idr_remove(&cgrp->root->cgroup_idr, cgrp->id);