linux-kernel - Re: [PATCH V6 2/6] sched/deadline: Deferrable dl server

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Message-ID: <c4c6575d-5ea0-44ba-bbdc-eadad77dea81@redhat.com>
Date: Thu, 2 May 2024 10:35:02 +0200
From: Daniel Bristot de Oliveira <bristot@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>,
 Vincent Guittot <vincent.guittot@...aro.org>,
 Dietmar Eggemann <dietmar.eggemann@....com>,
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
 Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>,
 linux-kernel@...r.kernel.org, Luca Abeni <luca.abeni@...tannapisa.it>,
 Tommaso Cucinotta <tommaso.cucinotta@...tannapisa.it>,
 Thomas Gleixner <tglx@...utronix.de>, Joel Fernandes
 <joel@...lfernandes.org>, Vineeth Pillai <vineeth@...byteword.org>,
 Shuah Khan <skhan@...uxfoundation.org>, Phil Auld <pauld@...hat.com>,
 Suleiman Souhlal <suleiman@...gle.com>,
 Youssef Esmat <youssefesmat@...gle.com>,
 Daniel Bristot de Oliveira <bristot@...nel.org>
Subject: Re: [PATCH V6 2/6] sched/deadline: Deferrable dl server

On 4/10/24 19:47, Peter Zijlstra wrote:
>> +static enum hrtimer_restart dl_server_timer(struct hrtimer *timer, struct sched_dl_entity *dl_se)
>> +{
>> +	struct rq *rq = rq_of_dl_se(dl_se);
>> +	enum hrtimer_restart restart = 0;
>> +	struct rq_flags rf;
>> +	u64 fw;
>> +
>> +	rq_lock(rq, &rf);
> 	guard(rq_lock)(rq, &rf);

this is the way I found to get the &rf... inspired on sched_rr_get_interval():

        scoped_guard (rq_lock, rq) {
                struct rq_flags *rf = &scope.rf;

is that right?
-- Daniel