From: Kevin Hilman <khilman@kernel.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>,
linux-kernel@vger.kernel.org, Christoph Lameter <cl@linux.com>,
Mike Galbraith <bitbucket@online.de>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Tejun Heo <tj@kernel.org>, Viresh Kumar <viresh.kumar@linaro.org>
Subject: Re: [PATCH 3/4] workqueue: Create low-level unbound workqueues cpumask
Date: Mon, 16 Mar 2015 12:38:32 -0700 [thread overview]
Message-ID: <7hbnjsohqf.fsf@deeprootsystems.com> (raw)
In-Reply-To: <20150316172514.GD4054@lerouge> (Frederic Weisbecker's message of "Mon, 16 Mar 2015 18:25:27 +0100")
Frederic Weisbecker <fweisbec@gmail.com> writes:
> On Mon, Mar 16, 2015 at 10:12:12AM -0700, Kevin Hilman wrote:
>> Lai Jiangshan <laijs@cn.fujitsu.com> writes:
>>
>> > On 03/14/2015 07:49 AM, Kevin Hilman wrote:
[...]
>> >>
>> >> As I mentioned in an earlier discussion[1], I still think this could
>> >> default too the housekeeping CPUs in the NO_HZ_FULL case:
>> >>
>> >> #ifdef CONFIG_NO_HZ_FULL
>> >> cpumask_complement(wq_unbound_cpumask, tick_nohz_full_mask);
>> >
>> >
>> > No, the default/booted wq_unbound_cpumask should be cpu_possible_mask.
>> >
>>
>> Even for NO_HZ_FULL?
>>
>> IMO, for NO_HZ_FULL, we want the unbound workqueues to be on the
>> housekeeping CPU(s).
>
> If it should be the default on NO_HZ_FULL, maybe we should do this from the
> tick nohz code. Some late or fs initcall that will do the workqueue affinity,
> timer affinity, etc...
Sure, I'd be fine with that too.
Kevin
next prev parent reply other threads:[~2015-03-16 19:38 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-12 5:00 [PATCH 0/4] workqueue: Introduce low-level unbound wq sysfs cpumask v4 Lai Jiangshan
2015-03-12 5:00 ` [PATCH 1/4] workqueue: Reorder sysfs code Lai Jiangshan
2015-03-12 5:00 ` [PATCH 2/4] workqueue: split apply_workqueue_attrs() into 3 stages Lai Jiangshan
2015-03-12 5:00 ` [PATCH 3/4] workqueue: Create low-level unbound workqueues cpumask Lai Jiangshan
2015-03-12 17:33 ` Christoph Lameter
2015-03-13 23:49 ` Kevin Hilman
2015-03-14 0:52 ` Kevin Hilman
2015-03-14 7:52 ` Lai Jiangshan
2015-03-16 17:12 ` Kevin Hilman
2015-03-16 17:25 ` Frederic Weisbecker
2015-03-16 19:38 ` Kevin Hilman [this message]
2015-03-12 5:00 ` [PATCH 4/4] workqueue: Allow modifying low level unbound workqueue cpumask Lai Jiangshan
2015-03-12 17:42 ` Christoph Lameter
2015-03-13 1:38 ` Lai Jiangshan
2015-03-13 7:49 ` Lai Jiangshan
2015-03-12 17:49 ` [PATCH 0/4] workqueue: Introduce low-level unbound wq sysfs cpumask v4 Frederic Weisbecker
2015-03-13 6:02 ` Mike Galbraith
2015-03-18 4:40 ` [PATCH 0/4 V5] workqueue: Introduce low-level unbound wq sysfs cpumask v5 Lai Jiangshan
2015-03-18 4:40 ` [PATCH 1/4 V5] workqueue: Reorder sysfs code Lai Jiangshan
2015-03-24 15:41 ` Tejun Heo
2015-03-18 4:40 ` [PATCH 2/4 V5] workqueue: split apply_workqueue_attrs() into 3 stages Lai Jiangshan
2015-03-24 15:55 ` Tejun Heo
2015-03-18 4:40 ` [PATCH 3/4 V5] workqueue: Create low-level unbound workqueues cpumask Lai Jiangshan
2015-03-18 4:40 ` [PATCH 4/4 V5] workqueue: Allow modifying low level unbound workqueue cpumask Lai Jiangshan
2015-03-24 17:31 ` Tejun Heo
2015-03-31 7:46 ` Lai Jiangshan
2015-04-01 8:33 ` Lai Jiangshan
2015-04-01 15:52 ` Tejun Heo
2015-03-19 8:54 ` [PATCH 0/4 V5] workqueue: Introduce low-level unbound wq sysfs cpumask v5 Mike Galbraith
2015-04-02 11:14 ` [PATCH 0/4 V6] " Lai Jiangshan
2015-04-02 11:14 ` [PATCH 1/4 V6] workqueue: Reorder sysfs code Lai Jiangshan
2015-04-06 15:22 ` Tejun Heo
2015-04-02 11:14 ` [PATCH 2/4 V6] workqueue: split apply_workqueue_attrs() into 3 stages Lai Jiangshan
2015-04-06 15:39 ` Tejun Heo
2015-04-02 11:14 ` [PATCH 3/4 V6] workqueue: Create low-level unbound workqueues cpumask Lai Jiangshan
2015-04-02 11:14 ` [PATCH 4/4 V6] workqueue: Allow modifying low level unbound workqueue cpumask Lai Jiangshan
2015-04-06 15:53 ` Tejun Heo
2015-04-07 1:25 ` Lai Jiangshan
2015-04-07 1:58 ` Tejun Heo
2015-04-07 2:33 ` Lai Jiangshan
2015-04-07 11:26 ` [PATCH 1/3 V7] workqueue: split apply_workqueue_attrs() into 3 stages Lai Jiangshan
2015-04-07 11:26 ` [PATCH 2/3 V7] workqueue: Create low-level unbound workqueues cpumask Lai Jiangshan
2015-04-07 11:26 ` [PATCH 3/3 V7] workqueue: Allow modifying low level unbound workqueue cpumask Lai Jiangshan
2015-04-22 19:39 ` Tejun Heo
2015-04-22 23:02 ` Frederic Weisbecker
2015-04-23 6:29 ` Mike Galbraith
2015-04-17 14:57 ` [PATCH 1/3 V7] workqueue: split apply_workqueue_attrs() into 3 stages Tejun Heo
2015-04-20 3:21 ` Lai Jiangshan
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