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authorLi Zefan <lizefan@huawei.com>2014-07-09 16:48:01 +0800
committerTejun Heo <tj@kernel.org>2014-07-09 15:56:17 -0400
commit39bd0d15eca5af15ee1492964f317ecdb024a9d6 (patch)
tree243ed22f95b40f48faa3e14c7fe9bcaf69e3e8ff /kernel/cpuset.c
parent8b5f1c52dcd1accd3a940cfcb148bef6de589524 (diff)
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cpuset: initialize top_cpuset's configured masks at mount
We now have to support different behaviors for default hierachy and legacy hiearchy, top_cpuset's configured masks need to be initialized accordingly. Suppose we've offlined cpu1. On default hierarchy: # mount -t cgroup -o __DEVEL__sane_behavior xxx /cpuset # cat /cpuset/cpuset.cpus 0-15 On legacy hierarchy: # mount -t cgroup xxx /cpuset # cat /cpuset/cpuset.cpus 0,2-15 Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cpuset.c')
-rw-r--r--kernel/cpuset.c37
1 files changed, 28 insertions, 9 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 60577ccdbfc7..e4c31e6b8716 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2015,16 +2015,35 @@ static void cpuset_css_free(struct cgroup_subsys_state *css)
kfree(cs);
}
+static void cpuset_bind(struct cgroup_subsys_state *root_css)
+{
+ mutex_lock(&cpuset_mutex);
+ mutex_lock(&callback_mutex);
+
+ if (cgroup_on_dfl(root_css->cgroup)) {
+ cpumask_copy(top_cpuset.cpus_allowed, cpu_possible_mask);
+ top_cpuset.mems_allowed = node_possible_map;
+ } else {
+ cpumask_copy(top_cpuset.cpus_allowed,
+ top_cpuset.effective_cpus);
+ top_cpuset.mems_allowed = top_cpuset.effective_mems;
+ }
+
+ mutex_unlock(&callback_mutex);
+ mutex_unlock(&cpuset_mutex);
+}
+
struct cgroup_subsys cpuset_cgrp_subsys = {
- .css_alloc = cpuset_css_alloc,
- .css_online = cpuset_css_online,
- .css_offline = cpuset_css_offline,
- .css_free = cpuset_css_free,
- .can_attach = cpuset_can_attach,
- .cancel_attach = cpuset_cancel_attach,
- .attach = cpuset_attach,
- .base_cftypes = files,
- .early_init = 1,
+ .css_alloc = cpuset_css_alloc,
+ .css_online = cpuset_css_online,
+ .css_offline = cpuset_css_offline,
+ .css_free = cpuset_css_free,
+ .can_attach = cpuset_can_attach,
+ .cancel_attach = cpuset_cancel_attach,
+ .attach = cpuset_attach,
+ .bind = cpuset_bind,
+ .base_cftypes = files,
+ .early_init = 1,
};
/**