diff options
| author | Tejun Heo <tj@kernel.org> | 2014-04-23 19:13:16 +0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-04-23 19:13:16 +0400 |
| commit | 6803c006282768ec850760766a6e4eb1a6ff87df (patch) | |
| tree | e06bc433865262b4943d3e06e8f3530d34c509bc | |
| parent | bd53d617b34c781dac8e22dbc75e8f182d918ecf (diff) | |
| download | linux-6803c006282768ec850760766a6e4eb1a6ff87df.tar.xz | |
cgroup: add css_set->dfl_cgrp
To implement the unified hierarchy behavior, we'll need to be able to
determine the associated cgroup on the default hierarchy from css_set.
Let's add css_set->dfl_cgrp so that it can be accessed conveniently
and efficiently.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
| -rw-r--r-- | include/linux/cgroup.h | 3 | ||||
| -rw-r--r-- | kernel/cgroup.c | 4 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 18fcae39e63e..c49d161a71cd 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -354,6 +354,9 @@ struct css_set { */ struct list_head cgrp_links; + /* the default cgroup associated with this css_set */ + struct cgroup *dfl_cgrp; + /* * Set of subsystem states, one for each subsystem. This array is * immutable after creation apart from the init_css_set during diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 2a4f88db3205..c66bfc8ee8a7 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -651,6 +651,10 @@ static void link_css_set(struct list_head *tmp_links, struct css_set *cset, struct cgrp_cset_link *link; BUG_ON(list_empty(tmp_links)); + + if (cgroup_on_dfl(cgrp)) + cset->dfl_cgrp = cgrp; + link = list_first_entry(tmp_links, struct cgrp_cset_link, cset_link); link->cset = cset; link->cgrp = cgrp; |