From: Josh Don <joshdon@google.com>
To: Tao Zhou <tao.zhou@linux.dev>
Cc: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Paul Turner <pjt@google.com>, Oleg Rombakh <olegrom@google.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
Steve Sistare <steven.sistare@oracle.com>,
Tejun Heo <tj@kernel.org>, Rik van Riel <riel@surriel.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 1/4] sched: cgroup SCHED_IDLE support
Date: Mon, 23 Aug 2021 10:29:53 -0700 [thread overview]
Message-ID: <CABk29NvH6_JoLydcrJf+yiaasGUbNEjzKdPjZxnWdrAFboJdsg@mail.gmail.com> (raw)
In-Reply-To: <YR9qRta78uYXSva6@geo.homenetwork>
Hi Tao,
On Fri, Aug 20, 2021 at 1:38 AM Tao Zhou <tao.zhou@linux.dev> wrote:
[snip]
> > #ifdef CONFIG_SMP
> > extern void set_task_rq_fair(struct sched_entity *se,
> > struct cfs_rq *prev, struct cfs_rq *next);
> > @@ -601,6 +606,9 @@ struct cfs_rq {
> > struct list_head leaf_cfs_rq_list;
> > struct task_group *tg; /* group that "owns" this runqueue */
> >
> > + /* Locally cached copy of our task_group's idle value */
> > + int idle;
> > +
> > #ifdef CONFIG_CFS_BANDWIDTH
> > int runtime_enabled;
> > s64 runtime_remaining;
> > --
> > 2.33.0.rc2.250.ged5fa647cd-goog
> >
>
> Cfs_rq and tg define @idle with int type.
> In sched_group_set_idle(..., long idle), @idle is long type.
> Use int instead.
>
> But, you filter idle value:
>
> if (idle < 0 || idle > 1)
> return -EINVAL;
>
> So, no effect here.. Just @idle can use 4 bytes.
>
>
>
> Thanks,
> Tao
The use of 'long' there is because the input from the cgroup
interface is a 64 bit value.
- Josh
next prev parent reply other threads:[~2021-08-23 17:30 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 1:03 [PATCH v3 0/4] SCHED_IDLE extensions Josh Don
2021-08-20 1:04 ` [PATCH v3 2/4] sched: account number of SCHED_IDLE entities on each cfs_rq Josh Don
2021-08-24 7:57 ` Vincent Guittot
2021-09-09 11:18 ` [tip: sched/core] sched: Account " tip-bot2 for Josh Don
2021-10-05 14:12 ` tip-bot2 for Josh Don
2021-08-20 1:04 ` [PATCH v3 3/4] sched: reduce sched slice for SCHED_IDLE entities Josh Don
2021-08-23 10:08 ` Vincent Guittot
2021-08-23 17:40 ` Josh Don
2021-08-24 7:56 ` Vincent Guittot
2021-08-24 10:24 ` Jiang Biao
2021-08-24 17:04 ` Josh Don
2021-08-25 2:43 ` Jiang Biao
2021-09-09 11:18 ` [tip: sched/core] " tip-bot2 for Josh Don
2021-10-05 14:12 ` tip-bot2 for Josh Don
2021-08-20 1:04 ` [PATCH v3 4/4] sched: adjust sleeper credit " Josh Don
2021-08-23 10:09 ` Vincent Guittot
2021-08-24 8:16 ` Jiang Biao
2021-08-24 17:12 ` Josh Don
2021-09-09 11:18 ` [tip: sched/core] " tip-bot2 for Josh Don
2021-10-05 14:12 ` tip-bot2 for Josh Don
[not found] ` <20210906124702.Q6G0oOWwFOmQSl_jmRms3XQgfz4ROzfE71r3SNgWSf0@z>
2021-09-06 12:47 ` [PATCH v3 1/4] sched: cgroup SCHED_IDLE support alexs
2021-08-20 8:39 ` Tao Zhou
2021-08-23 17:29 ` Josh Don [this message]
2021-08-23 22:45 ` Tao Zhou
2021-09-02 1:22 ` Daniel Jordan
2021-09-03 1:21 ` Josh Don
2021-09-08 20:38 ` Daniel Jordan
2021-09-08 18:36 ` Josh Don
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