linux-kernel - Re: [PATCH RFC] ioctl based CAT interface

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Message-ID: <20151116212200.GA5186@amt.cnet>
Date:	Mon, 16 Nov 2015 19:22:01 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Luiz Capitulino <lcapitulino@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vikas Shivappa <vikas.shivappa@...el.com>,
	Tejun Heo <tj@...nel.org>, Yu Fenghua <fenghua.yu@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] ioctl based CAT interface

On Mon, Nov 16, 2015 at 04:01:33PM +0100, Peter Zijlstra wrote:
> On Mon, Nov 16, 2015 at 11:03:57AM -0200, Marcelo Tosatti wrote:
> > cgroup CAT interface (non hierarchical):
> 
> That's a fail right there. Cgroup thingies must be hierarchical.

What is the problem with ioctls again? (haven't seen any technical
argument).

If the ioctls were replaced by say, syscalls you would be happy?

If the ioctls were replaced by attach/detach/delete/unassign commands
via directories, would you be happy?


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