linux-kernel - Re: [PATCH 1/2] sched/deadline: Modify cpudl.free

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Date:	Tue, 18 Nov 2014 21:32:13 +0800
From:	"pang.xunlei" <pang.xunlei@...aro.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...il.com>
Subject: Re: [PATCH 1/2] sched/deadline: Modify cpudl.free_cpus to reflect rd->span

On 18 November 2014 03:39, Steven Rostedt <rostedt@...dmis.org> wrote:
> On Tue, 18 Nov 2014 00:11:03 +0800
>
>> index 539ca3c..9a69353
>> --- a/kernel/sched/cpudeadline.c
>> +++ b/kernel/sched/cpudeadline.c
>> @@ -107,7 +107,9 @@ int cpudl_find(struct cpudl *cp, struct task_struct *p,
>>       int best_cpu = -1;
>>       const struct sched_dl_entity *dl_se = &p->dl;
>>
>> -     if (later_mask && cpumask_and(later_mask, later_mask, cp->free_cpus)) {
>> +     if (later_mask && cpumask_and(later_mask, cp->free_cpus,
>> +                     &p->cpus_allowed) && cpumask_and(later_mask,
>> +                     later_mask, cpu_active_mask)) {
>
> I did a quick review of this patch, and it looks fine to me. But the
> above looks ugly. Please change it to something more readable like:

Yes, the following looks beautiful. I'll adjust it, thanks!
>
>         if (later_mask &&
>             cpumask_and(later_mask, cp->free_cpus, &p->cpus_allowed) &&
>             cpumask_and(later_mask, later_mask, cpu_active_mask)) {
>
> Thanks,
>
> -- Steve
>
>
>>               best_cpu = cpumask_any(later_mask);
>>               goto out;
>>       } else if (cpumask_test_cpu(cpudl_maximum(cp), &p->cpus_allowed) &&
>> @@ -186,6 +188,17 @@ out:
>>  }
>>
>
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