From: Juri Lelli <juri.lelli@redhat.com>
To: Valentin Schneider <valentin.schneider@arm.com>
Cc: linux-kernel@vger.kernel.org, mingo@kernel.org,
peterz@infradead.org, vincent.guittot@linaro.org,
tglx@linutronix.de, qais.yousef@arm.com,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH v2 0/4] sched/fair: Active balancer RT/DL preemption fix
Date: Tue, 1 Oct 2019 15:31:15 +0200 [thread overview]
Message-ID: <20191001133115.GC6481@localhost.localdomain> (raw)
In-Reply-To: <b442e1b5-a800-5dde-2e42-e4981089edf4@arm.com>
Hi Valentin,
On 01/10/19 11:29, Valentin Schneider wrote:
> (expanded the Cc list)
> RT/DL folks, any thought on the thing?
Even if I like your idea and it looks theoretically the right thing to
do, I'm not sure we want it in practice if it adds complexity to CFS.
I personally never noticed this kind of interference from CFS, but, at
the same time, for RT we usually like more to be safe than sorry.
However, since this doesn't seem to be bullet-proof (as you also say), I
guess it all boils down again to complexity vs. practical benefits.
Best,
Juri
next prev parent reply other threads:[~2019-10-01 13:31 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-15 14:51 [PATCH v2 0/4] sched/fair: Active balancer RT/DL preemption fix Valentin Schneider
2019-08-15 14:51 ` [PATCH v2 1/4] sched/fair: Make need_active_balance() return bools Valentin Schneider
2019-08-15 14:51 ` [PATCH v2 2/4] sched/fair: Move active balance logic to its own function Valentin Schneider
2019-10-01 11:36 ` Srikar Dronamraju
2019-10-01 11:48 ` Valentin Schneider
2019-08-15 14:51 ` [PATCH v2 3/4] sched/fair: Check for CFS tasks before detach_one_task() Valentin Schneider
2019-08-15 14:51 ` [PATCH v2 4/4] sched/fair: Prevent active LB from preempting higher sched classes Valentin Schneider
2019-08-27 12:28 ` Vincent Guittot
2019-08-28 9:46 ` Valentin Schneider
2019-08-29 14:19 ` Vincent Guittot
2019-08-30 15:44 ` Valentin Schneider
2019-10-01 10:29 ` [PATCH v2 0/4] sched/fair: Active balancer RT/DL preemption fix Valentin Schneider
2019-10-01 13:31 ` Juri Lelli [this message]
2019-10-01 14:15 ` Valentin Schneider
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