From: Peter Zijlstra <peterz@infradead.org>
To: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, Tejun Heo <tj@kernel.org>,
cgroups@vger.kernel.org, containers@lists.linux-foundation.org
Subject: Re: [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups
Date: Mon, 16 May 2016 14:26:45 +0200 [thread overview]
Message-ID: <20160516122645.GO3193@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <5739BB7E.8010902@yandex-team.ru>
On Mon, May 16, 2016 at 03:22:22PM +0300, Konstantin Khlebnikov wrote:
> >You forgot to explain why I should care about this.
>
> As I told this works as low-limit or high-limit which allow to
> control cpu time distribution without hard limits and throttling.
That's what it does; I get that. However nothing tells me why I should
care about it. IOW, its a solution without a problem, and I tend to
ignore those -- saves a lot of time on my end.
> Present quota/hard limit has well known problems when it throttle task
> inside kernel where it holds mutexes. Also it's too strict and doesn't
> allow utilization of unused cpu time.
See; now you're starting to make sense. You cannot have a patch if you
don't have a problem. And this series didn't have a problem to solve.
As for the latter; that's a feature for many people I'm told.
prev parent reply other threads:[~2016-05-16 12:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-16 9:36 [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups Konstantin Khlebnikov
2016-05-16 9:36 ` [PATCH RFC 1/3] sched/fair: call __refill_cfs_bandwidth_runtime only for finite quota Konstantin Khlebnikov
2016-05-16 9:36 ` [PATCH RFC 2/3] sched/fair: copy taskgroup shares to each cfs_rq Konstantin Khlebnikov
2016-05-16 9:36 ` [PATCH RFC 3/3] sched/fair: pulse-weight modulation controller for cpu cgroup Konstantin Khlebnikov
2016-05-16 11:18 ` [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups Peter Zijlstra
2016-05-16 12:22 ` Konstantin Khlebnikov
2016-05-16 12:26 ` Peter Zijlstra [this message]
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