linux-kernel - Re: [Documentation] State of CPU controller in cgroup v2

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Date:	Tue, 16 Aug 2016 10:58:01 -0400
From:	Chris Mason <clm@...com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Johannes Weiner <hannes@...xchg.org>
CC:	Mike Galbraith <umgwanakikbuti@...il.com>,
	Tejun Heo <tj@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Li Zefan <lizefan@...wei.com>, Paul Turner <pjt@...gle.com>,
	Ingo Molnar <mingo@...hat.com>, <linux-kernel@...r.kernel.org>,
	<cgroups@...r.kernel.org>, <linux-api@...r.kernel.org>,
	<kernel-team@...com>
Subject: Re: [Documentation] State of CPU controller in cgroup v2



On 08/16/2016 10:07 AM, Peter Zijlstra wrote:
> On Wed, Aug 10, 2016 at 06:09:44PM -0400, Johannes Weiner wrote:
>
>> [ That, and a disturbing number of emotional outbursts against
>>   systemd, which has nothing to do with any of this. ]
>
> Oh, so I'm entirely dreaming this then:
>
>   https://github.com/systemd/systemd/pull/3905
>
> Completely unrelated.
>
> Also, the argument there seems unfair at best, you don't need cpu-v2 for
> buffered write control, you only need memcg and block co-mounted.
>

This isn't systemd dictating cgroups2 or systemd trying to get rid of 
v1.  But systemd is a common user of cgroups, and we do use it here in 
production.

We're just sending patches upstream for the tools we're using.  It's 
better than keeping them private, or reinventing a completely different 
tool that does almost the same thing.

-chris