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From: Thomas Gleixner <>
To: "Luck, Tony" <>
Cc: Vikas Shivappa <>,,,,,,,,,
Subject: Re: [PATCH 1/3] x86/intel_rdt: Fix issue when mkdir uses a freed CLOSid
Date: Mon, 10 Apr 2017 19:08:59 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1704101906280.2906@nanos> (raw)
In-Reply-To: <>

On Wed, 5 Apr 2017, Luck, Tony wrote:
> On Wed, Apr 05, 2017 at 05:20:24PM +0200, Thomas Gleixner wrote:
> > That's just wrong.
> > 
> > The proper behaviour for a new control group is, that at the time when it
> > is created it copies the CBM values of the default group and not claiming
> > access to ALL of the cache by default.
> I don't see that as any more helpful. When you make a new
> control group it is because none of the existing groups
> provides the QoS that you want.  So the first thing the
> user will do is write the schemata file with the values
> they do want.
> So "all access", or "same as default group" are both the
> same to the user ... not what they want.
> We do need to make sure that the schemata matches what is
> in the registers. We need to make sure that changes to the
> schemata file result in the MSRs being written where needed.

That's true today. The MSRs and the schemata file of a newly created group
always match. So there's nothing to fix, right?



  parent reply	other threads:[~2017-04-10 17:09 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-03 21:44 [PATCH 0/3 V3] x86/intel_rdt: Improvements/Fixes to RDT framework Vikas Shivappa
2017-04-03 21:44 ` [PATCH 1/3] x86/intel_rdt: Fix issue when mkdir uses a freed CLOSid Vikas Shivappa
2017-04-05 15:20   ` Thomas Gleixner
2017-04-05 18:03     ` Shivappa Vikas
2017-04-05 18:07     ` Luck, Tony
2017-04-05 20:17       ` Fenghua Yu
2017-04-10 17:08       ` Thomas Gleixner [this message]
2017-04-11 18:51         ` Shivappa Vikas
2017-04-03 21:44 ` [PATCH 2/3] x86/intel_rdt: Implement "update" mode when writing schemata file Vikas Shivappa
2017-04-05 15:27   ` [tip:x86/cpu] " tip-bot for Tony Luck
2017-04-03 21:44 ` [PATCH 3/3] x86/intel_rdt: Update schemata read to show data in tabular format Vikas Shivappa
2017-04-05 15:28   ` [tip:x86/cpu] " tip-bot for Vikas Shivappa

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