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From: Peter Zijlstra <peterz@infradead.org>
To: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: mingo@redhat.com, linux-kernel@vger.kernel.org,
	Juri Lelli <juri.lelli@gmail.com>
Subject: Re: [PATCH] sched/rt: Rework for_each_process_thread() iterations in tg_has_rt_tasks()
Date: Wed, 25 Apr 2018 19:55:35 +0200	[thread overview]
Message-ID: <20180425175535.GC4043@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <152415882713.2054.8734093066910722403.stgit@localhost.localdomain>

On Thu, Apr 19, 2018 at 08:29:01PM +0300, Kirill Tkhai wrote:
> tg_rt_schedulable() iterates over all child task groups,
> while tg_has_rt_tasks() iterates over all linked tasks.
> In case of systems with big number of tasks, this may
> take a lot of time.

So you're actually using RT cgroups?

Some of us recently considered removing that thing entirely because most
distro's don't actually use it at all -- and it's broken from a RT POV.

That would then clear the slate to try and implement something new.

But if you're actually using this stuff, that would complicate matters.

  parent reply	other threads:[~2018-04-25 17:55 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-19 17:29 Kirill Tkhai
2018-04-20  9:25 ` Juri Lelli
2018-04-20  9:43   ` Kirill Tkhai
2018-04-20 10:06     ` [PATCH v2] " Kirill Tkhai
2018-04-20 14:11       ` Juri Lelli
2018-04-20 14:30         ` Kirill Tkhai
2018-04-20 15:27           ` Juri Lelli
2018-04-25 15:42       ` Kirill Tkhai
2018-04-25 19:49       ` Peter Zijlstra
2018-04-26  9:54         ` [PATCH v3]sched/rt: Stop " Kirill Tkhai
2020-01-23 21:56           ` Phil Auld
2020-01-24  9:09             ` Kirill Tkhai
2020-01-27 16:30               ` Phil Auld
2020-01-27 16:43             ` Peter Zijlstra
2020-01-27 16:56               ` Phil Auld
2020-01-27 17:00                 ` Peter Zijlstra
2020-01-27 17:45                   ` Phil Auld
2018-04-20 10:58     ` [PATCH] sched/rt: Rework " Juri Lelli
2018-04-20 11:21       ` Kirill Tkhai
2018-04-25 17:55 ` Peter Zijlstra [this message]
2018-04-26  9:26   ` Kirill Tkhai

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