From: Li Zefan <lizefan@huawei.com>
To: Tejun Heo <tj@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Cgroups <cgroups@vger.kernel.org>,
Containers <containers@lists.linux-foundation.org>
Subject: Re: [PATCH 08/11] cpuset: separate configured masks and efffective masks
Date: Fri, 23 Aug 2013 15:46:47 +0800 [thread overview]
Message-ID: <52171367.90005@huawei.com> (raw)
In-Reply-To: <20130821140846.GH19286@mtj.dyndns.org>
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.
next prev parent reply other threads:[~2013-08-23 7:46 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-21 9:58 [PATCH 00/11] cpuset: separate configured masks and effective masks Li Zefan
2013-08-21 9:58 ` [PATCH 01/11] cgroup: allow subsystems to create files for sane_behavior only Li Zefan
2013-08-21 9:59 ` [PATCH 02/11] cpuset: add cs->real_cpus_allowed and cs->real_mems_allowed Li Zefan
2013-08-21 13:22 ` Tejun Heo
2013-08-21 9:59 ` [PATCH 03/11] cpuset: update cpuset->real_{cpus,mems}_allowed at hotplug Li Zefan
2013-08-21 9:59 ` [PATCH 04/11] cpuset: update cs->real_{cpus,mems}_allowed when config changes Li Zefan
2013-08-21 13:39 ` Tejun Heo
2013-08-21 9:59 ` [PATCH 05/11] cpuset: inherite ancestor's masks if real_{cpus,mems}_allowed become empty Li Zefan
2013-08-21 13:44 ` Tejun Heo
2013-08-21 9:59 ` [PATCH 06/11] cpuset: apply cs->real_{cpus,mems}_allowed Li Zefan
2013-08-21 14:01 ` Tejun Heo
2013-08-21 10:00 ` [PATCH 07/11] cpuset: use effective cpumask to build sched domains Li Zefan
2013-08-21 14:04 ` Tejun Heo
2013-08-21 10:00 ` [PATCH 08/11] cpuset: separate configured masks and efffective masks Li Zefan
2013-08-21 14:08 ` Tejun Heo
2013-08-23 7:46 ` Li Zefan [this message]
2013-08-23 15:33 ` Tejun Heo
2013-08-21 10:01 ` [PATCH 09/11] cpuset: enable onlined cpu/node in effective masks Li Zefan
2013-08-21 14:11 ` Tejun Heo
2013-08-21 10:01 ` [PATCH 10/11] cpuset: allow writing offlined masks to cpuset.cpus/mems Li Zefan
2013-08-21 14:18 ` Tejun Heo
2013-08-23 7:37 ` Li Zefan
2013-08-21 10:01 ` [PATCH 11/11] cpuset: export effective masks to userspace Li Zefan
2013-08-21 14:20 ` Tejun Heo
2013-08-23 7:53 ` Li Zefan
2013-08-23 12:34 ` Tejun Heo
2013-08-21 14:21 ` [PATCH 00/11] cpuset: separate configured masks and effective masks Tejun Heo
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