Re: [PATCH] sched/deadline: No need to check NULL later_mask

From	Xunlei Pang <xpang@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] sched/deadline: No need to check NULL later_mask
Date	2016-04-06 15:10 +0200
Message-ID	<rkVnA-4fv-23@gated-at.bofh.it> (permalink)
References	(1 earlier) <rj5r5-3yN-23@gated-at.bofh.it> <rj6ds-46Z-7@gated-at.bofh.it> <rja7o-70D-3@gated-at.bofh.it> <rjqOS-2eO-3@gated-at.bofh.it> <rkS6m-1Kx-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On 2016/04/06 at 17:30, Peter Zijlstra wrote:
> On Sat, Apr 02, 2016 at 06:14:28PM +0800, Xunlei Pang wrote:
>> Your proposal is very nice!
>>
>> At the sched_init() stage we only have one (to be "idle") task and with irq disabled,
>> no scheduling will happen, and the cpu_possible_mask was already initiated, so it's
>> safe to simply move them there.
>>
>> Also, how about rt&deadline sharing a percpu mask? Because only one of them can
>> use the mask at a moment, operations are always under some spin_lock_irqsave().
>>
>> I made a new patch below, slightly tested by running tens of rt&dl tasks for a while,
>> are you fine with it?
> Yep, looks fine. Please submit as a proper patch.

Will do, thanks!

Regards,
Xunlei

>
> Thanks!

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: [PATCH] sched/deadline: No need to check NULL later_mask Peter Zijlstra <peterz@infradead.org> - 2016-04-06 11:40 +0200
  Re: [PATCH] sched/deadline: No need to check NULL later_mask Xunlei Pang <xpang@redhat.com> - 2016-04-06 15:10 +0200

csiph-web