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| author |   Li Zefan <lizefan@huawei.com> | 2014-07-09 16:48:01 +0800 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2014-07-09 15:56:17 -0400 |
| commit | 39bd0d15eca5af15ee1492964f317ecdb024a9d6 (patch) | |
| tree | 243ed22f95b40f48faa3e14c7fe9bcaf69e3e8ff /kernel/cpuset.c | |
| parent | cpuset: use effective cpumask to build sched domains (diff) | |
| download | linux-dev-39bd0d15eca5af15ee1492964f317ecdb024a9d6.tar.xz linux-dev-39bd0d15eca5af15ee1492964f317ecdb024a9d6.zip | |
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.c | 37 |
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, }; /** |