cgroup structures

Cgroup includes many css_set, and in the same way, one css_set can be included in many Cgroups. cg_cgroup_link is used to build this relationship. For example, the following 4 cg_cgroup_links are used to make all combinations with in cgroup1, cgroup2, css_sets1 and css_sets2. And, cgroup1 maintains list of all css_sets it includes and css_set maintains list of all cgroups it has been included using the same cg_cgroup_links structures.

 

 

/* Link structure for associating css_set objects with cgroups */

struct cg_cgroup_link {

        /*

         * List running through cg_cgroup_links associated with a

         * cgroup, anchored on cgroup->css_sets

         */

        struct list_head cgrp_link_list;

        struct cgroup *cgrp;

        /*

         * List running through cg_cgroup_links pointing at a

         * single css_set object, anchored on css_set->cg_links

         */

        struct list_head cg_link_list;

        struct css_set *cg;

};