cpuset: initialize top_cpuset's configured masks at mount (39bd0d15) · Commits · 戴 / test

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>

kernel/cpuset.c

+28 −9

Original line number	Diff line number	Diff line
		@@ -2015,6 +2015,24 @@ 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,
		@@ -2023,6 +2041,7 @@ struct cgroup_subsys cpuset_cgrp_subsys = {
		.can_attach = cpuset_can_attach,
		.cancel_attach = cpuset_cancel_attach,
		.attach = cpuset_attach,
		.bind = cpuset_bind,
		.base_cftypes = files,
		.early_init = 1,
		};

Admin message