From: Miaohe Lin <linmiaohe@huawei.com>
To: Phil Auld <pauld@redhat.com>, <bristot@redhat.com>,
<vschneid@redhat.com>, <dietmar.eggemann@arm.com>,
<quic_mojha@quicinc.com>
Cc: <mingo@redhat.com>, <peterz@infradead.org>,
<juri.lelli@redhat.com>, <vincent.guittot@linaro.org>,
<dietmar.eggemann@arm.com>, <rostedt@goodmis.org>,
<bsegall@google.com>, <mgorman@suse.de>, <bristot@redhat.com>,
<vschneid@redhat.com>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sched/deadline: simplify dl_bw_cpus() using cpumask_weight_and()
Date: Wed, 14 Jun 2023 09:43:49 +0800 [thread overview]
Message-ID: <1d5e80c1-69e6-e2e8-a5d1-6117cb661013@huawei.com> (raw)
In-Reply-To: <20230613131651.GA536267@lorien.usersys.redhat.com>
On 2023/6/13 21:16, Phil Auld wrote:
> On Tue, Jun 13, 2023 at 08:19:22PM +0800 Miaohe Lin wrote:
>> On 2023/5/22 19:56, Miaohe Lin wrote:
>>> cpumask_weight_and() can be used to count of bits both in rd->span and
>>> cpu_active_mask. No functional change intended.
>>>
>>> Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
>>
>> friendly ping... :)
>
> This looks reasonable, and better, to me.
>
> Reviewed-by: Phil Auld <pauld@redhat.com>
Many thanks for all of your reviews. :)
>
>>
>>> ---
>>> kernel/sched/deadline.c | 11 +----------
>>> 1 file changed, 1 insertion(+), 10 deletions(-)
>>>
>>> diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
>>> index 166c3e6eae61..fe983ed7bb12 100644
>>> --- a/kernel/sched/deadline.c
>>> +++ b/kernel/sched/deadline.c
>>> @@ -110,20 +110,11 @@ static inline struct dl_bw *dl_bw_of(int i)
>>> static inline int dl_bw_cpus(int i)
>>> {
>>> struct root_domain *rd = cpu_rq(i)->rd;
>>> - int cpus;
>>>
>>> RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held(),
>>> "sched RCU must be held");
>>>
>>> - if (cpumask_subset(rd->span, cpu_active_mask))
>>> - return cpumask_weight(rd->span);
>>> -
>>> - cpus = 0;
>>> -
>>> - for_each_cpu_and(i, rd->span, cpu_active_mask)
>>> - cpus++;
>>> -
>>> - return cpus;
>>> + return cpumask_weight_and(rd->span, cpu_active_mask);
>>> }
>>>
>>> static inline unsigned long __dl_bw_capacity(const struct cpumask *mask)
>>>
>>
>
prev parent reply other threads:[~2023-06-14 1:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-22 11:56 [PATCH] sched/deadline: simplify dl_bw_cpus() using cpumask_weight_and() Miaohe Lin
2023-05-22 10:47 ` Mukesh Ojha
2023-05-22 16:58 ` Dietmar Eggemann
2023-05-24 10:59 ` Valentin Schneider
2023-05-25 9:56 ` Daniel Bristot de Oliveira
2023-06-13 12:19 ` Miaohe Lin
2023-06-13 13:16 ` Phil Auld
2023-06-14 1:43 ` Miaohe Lin [this message]
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