linux-kernel - Re: [RFD] CAT user space interface revisited

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Message-ID: <alpine.DEB.2.11.1601082117380.3575@nanos>
Date:	Fri, 8 Jan 2016 21:21:37 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Marcelo Tosatti <mtosatti@...hat.com>
cc:	"Yu, Fenghua" <fenghua.yu@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"x86@...nel.org" <x86@...nel.org>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	"Shivappa, Vikas" <vikas.shivappa@...el.com>,
	Tejun Heo <tj@...nel.org>,
	"Shankar, Ravi V" <ravi.v.shankar@...el.com>,
	"Luck, Tony" <tony.luck@...el.com>
Subject: Re: [RFD] CAT user space interface revisited

On Wed, 6 Jan 2016, Thomas Gleixner wrote:
> 
> This is general information:
> 
> xxxxxxx/cat/max_cosids
> xxxxxxx/cat/max_maskbits
> xxxxxxx/cat/cdp_enable
> 
> This is per socket information and per socket cos-id management

Just had a discussion with HPA about this and he pointed out that socket might
not be the proper solution. The correct partitioning unit is cache domains. So
we should change socket-X to L3-domain-X. That'll allow us to integrate future
things like CAT on L2.

Thanks,

	tglx