linux-kernel - Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide

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Message-ID: <alpine.DEB.2.10.1508041338140.921@vshiva-Udesk>
Date:	Tue, 4 Aug 2015 13:41:15 -0700 (PDT)
From:	Vikas Shivappa <vikas.shivappa@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
	linux-kernel@...r.kernel.org, vikas.shivappa@...el.com,
	x86@...nel.org, hpa@...or.com, tglx@...utronix.de,
	mingo@...nel.org, tj@...nel.org, matt.fleming@...el.com,
	will.auld@...el.com, glenn.p.williamson@...el.com,
	kanaka.d.juvva@...el.com
Subject: Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and
 cgroup usage guide



On Tue, 28 Jul 2015, Peter Zijlstra wrote:

> On Wed, Jul 01, 2015 at 03:21:04PM -0700, Vikas Shivappa wrote:
>
> Please edit this document to have consistent spacing. Its really hard to
> read this. Every time I spot a misplaced space my brain stumbles and I
> need to restart.

Will fix all the spacing and other indentions issues mentioned. 
Thanks for pointing them all out. Although the other documents I see dont have a 
consistent format completely which is what confused me, this format would be 
better.

>> +
>> +The following considerations are done for the PQR MSR write so that it
>> +has minimal impact on scheduling hot path:
>> +- This path doesnt exist on any non-intel platforms.
>
> !x86 I think you mean, its entirely possible to have the code present
> on AMD systems for instance.
>
>> +- On Intel platforms, this would not exist by default unless CGROUP_RDT
>> +is enabled.
>
> You can enable this just fine on AMD machines.

The cache alloc code is under CPU_SUP_INTEL ..

Thanks,
Vikas
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