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Commit e0e80a02 authored by Li Zhong's avatar Li Zhong Committed by Tejun Heo
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cpuset: use rebuild_sched_domains() in cpuset_hotplug_workfn() 



In cpuset_hotplug_workfn(), partition_sched_domains() is called without
hotplug lock held, which is actually needed (stated in the function
header of partition_sched_domains()).

This patch tries to use rebuild_sched_domains() to solve the above
issue, and makes the code looks a little simpler.

Signed-off-by: default avatarLi Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: default avatarLi Zefan <lizefan@huawei.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 7ef70e48

kernel/cpuset.c

+2 −11
Original line number Diff line number Diff line
@@ -2172,17 +2172,8 @@ static void cpuset_hotplug_workfn(struct work_struct *work) 
	flush_workqueue(cpuset_propagate_hotplug_wq);



	/* rebuild sched domains if cpus_allowed has changed */

	if (cpus_updated) {

		struct sched_domain_attr *attr;

		cpumask_var_t *doms;

		int ndoms;



		mutex_lock(&cpuset_mutex);

		ndoms = generate_sched_domains(&doms, &attr);

		mutex_unlock(&cpuset_mutex);



		partition_sched_domains(ndoms, doms, attr);

	}

	if (cpus_updated)

		rebuild_sched_domains();

}



void cpuset_update_active_cpus(bool cpu_online)