diff options
Diffstat (limited to 'kernel/cgroup/cpuset.c')
| -rw-r--r-- | kernel/cgroup/cpuset.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 2b5c4477d969..29a2bdc671fd 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -110,6 +110,13 @@ struct cpuset { nodemask_t effective_mems; /* + * CPUs allocated to child sub-partitions (default hierarchy only) + * - CPUs granted by the parent = effective_cpus U subparts_cpus + * - effective_cpus and subparts_cpus are mutually exclusive. + */ + cpumask_var_t subparts_cpus; + + /* * This is old Memory Nodes tasks took on. * * - top_cpuset.old_mems_allowed is initialized to mems_allowed. @@ -134,6 +141,30 @@ struct cpuset { /* for custom sched domain */ int relax_domain_level; + + /* number of CPUs in subparts_cpus */ + int nr_subparts_cpus; + + /* partition root state */ + int partition_root_state; +}; + +/* + * Partition root states: + * + * 0 - not a partition root + * 1 - partition root + */ +#define PRS_DISABLED 0 +#define PRS_ENABLED 1 + +/* + * Temporary cpumasks for working with partitions that are passed among + * functions to avoid memory allocation in inner functions. + */ +struct tmpmasks { + cpumask_var_t addmask, delmask; /* For partition root */ + cpumask_var_t new_cpus; /* For update_cpumasks_hier() */ }; static inline struct cpuset *css_cs(struct cgroup_subsys_state *css) @@ -218,9 +249,15 @@ static inline int is_spread_slab(const struct cpuset *cs) return test_bit(CS_SPREAD_SLAB, &cs->flags); } +static inline int is_partition_root(const struct cpuset *cs) +{ + return cs->partition_root_state; +} + static struct cpuset top_cpuset = { .flags = ((1 << CS_ONLINE) | (1 << CS_CPU_EXCLUSIVE) | (1 << CS_MEM_EXCLUSIVE)), + .partition_root_state = PRS_ENABLED, }; /** |