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

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Message-ID: <20151119205925.GA13727@amt.cnet>
Date:	Thu, 19 Nov 2015 18:59:26 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Vikas Shivappa <vikas.shivappa@...el.com>,
	Tejun Heo <tj@...nel.org>, Yu Fenghua <fenghua.yu@...el.com>
Subject: Re: [RFD] CAT user space interface revisited

On Thu, Nov 19, 2015 at 10:09:03AM +0100, Thomas Gleixner wrote:
> On Wed, 18 Nov 2015, Marcelo Tosatti wrote
> > Actually, there is a point that is useful: you might want the important
> > application to share the L3 portion with HW (that HW DMAs into), and
> > have only the application and the HW use that region.
> > 
> > So its a good point that controlling the exact position of the reservation 
> > is important.
> 
> I'm glad you figured that out yourself. :)
> 
> Thanks,
> 
> 	tglx

The HW is a reclaimer of the L3 region shared with HW.

You might want to remove any threads from reclaiming from 
that region.

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