Messages in this thread | | | Date | Fri, 23 Aug 2013 15:46:47 +0800 | From | Li Zefan <> | Subject | Re: [PATCH 08/11] cpuset: separate configured masks and efffective masks |
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On 2013/8/21 22:08, Tejun Heo wrote: > On Wed, Aug 21, 2013 at 06:00:42PM +0800, Li Zefan wrote: >> @@ -2261,7 +2271,8 @@ static void cpuset_hotplug_workfn(struct work_struct *work) >> /* synchronize mems_allowed to N_MEMORY */ >> if (mems_updated) { >> mutex_lock(&callback_mutex); >> - top_cpuset.mems_allowed = new_mems; >> + if (!sane) >> + top_cpuset.mems_allowed = new_mems; > > Can you please further explain how the top cgroup behaves? >
top_cpuset.cpus_allowed will always be cpu_active_mask if sane_behavior is not set, otherwise it will always be cpu_possible_mask. While top_cpuset.effective_cpus will always be cpu_active_mask in either case.
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