From: shangxiaojing <shangxiaojing@huawei.com>
To: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: <mingo@redhat.com>, <peterz@infradead.org>,
<vincent.guittot@linaro.org>, <juri.lelli@redhat.com>,
<dietmar.eggemann@arm.com>, <rostedt@goodmis.org>,
<bsegall@google.com>, <mgorman@suse.de>, <vschneid@redhat.com>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -next] sched/deadline: Add compare_task_rq helper
Date: Fri, 26 Aug 2022 15:23:52 +0800 [thread overview]
Message-ID: <93f6bfae-7c2c-69e5-720c-89ba63e3a3fe@huawei.com> (raw)
In-Reply-To: <c5d40522-037d-e324-697b-23e5e4686d58@redhat.com>
On 2022/8/26 15:10, Daniel Bristot de Oliveira wrote:
> On 8/26/22 05:11, Shang XiaoJing wrote:
>> Wrap repeated code in helper function compare_task_rq, which return true
>> if there is no deadline task on the rq at all, or task's deadline
>> earlier than the rq.
>>
>> Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
>> ---
>> kernel/sched/deadline.c | 23 +++++++++++------------
>> 1 file changed, 11 insertions(+), 12 deletions(-)
>>
>> diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
>> index d116d2b9d2f9..4a40a462717c 100644
>> --- a/kernel/sched/deadline.c
>> +++ b/kernel/sched/deadline.c
>> @@ -1810,6 +1810,13 @@ static void yield_task_dl(struct rq *rq)
>>
>> #ifdef CONFIG_SMP
> I see the value of this helper, but "compare_task_rq" is making things more confuse.
>
> Choose a more descriptive name, like, dl_task_is_earliest_deadline() ?
ok, i'll find a better name, or take your advice directly in v2.
>> +static inline bool compare_task_rq(struct task_struct *p, struct rq *rq)
>> +{
>> + return (!rq->dl.dl_nr_running ||
>> + dl_time_before(p->dl.deadline,
>> + rq->dl.earliest_dl.curr));
>> +}
>> +
> -- Daniel
Thanks :-) ,
Shang XiaoJing
prev parent reply other threads:[~2022-08-26 7:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-26 3:11 [PATCH -next] sched/deadline: Add compare_task_rq helper Shang XiaoJing
2022-08-26 7:10 ` Daniel Bristot de Oliveira
2022-08-26 7:23 ` shangxiaojing [this message]
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