linux-kernel - RE: [PATCH v9 00/13] arch/resctrl: AMD QoS support

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Date:   Wed, 26 Dec 2018 17:14:37 +0000
From:   "Moger, Babu" <Babu.Moger@....com>
To:     Jan Engelhardt <jengelh@...i.de>
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Subject: RE: [PATCH v9 00/13] arch/resctrl: AMD QoS support

Hi Jan,

> -----Original Message-----
> From: Jan Engelhardt <jengelh@...i.de>
> Sent: Sunday, December 23, 2018 12:27 PM
> To: Moger, Babu <Babu.Moger@....com>
> Cc: tglx@...utronix.de; mingo@...hat.com; bp@...en8.de; corbet@....net;
> fenghua.yu@...el.com; reinette.chatre@...el.com; peterz@...radead.org;
> gregkh@...uxfoundation.org; davem@...emloft.net; akpm@...ux-
> foundation.org; hpa@...or.com; x86@...nel.org;
> mchehab+samsung@...nel.org; arnd@...db.de;
> kstewart@...uxfoundation.org; pombredanne@...b.com;
> rafael@...nel.org; kirill.shutemov@...ux.intel.com; tony.luck@...el.com;
> qianyue.zj@...baba-inc.com; xiaochen.shen@...el.com;
> pbonzini@...hat.com; Singh, Brijesh <brijesh.singh@....com>; Hurwitz,
> Sherry <sherry.hurwitz@....com>; dwmw2@...radead.org; Lendacky,
> Thomas <Thomas.Lendacky@....com>; luto@...nel.org; joro@...tes.org;
> jannh@...gle.com; vkuznets@...hat.com; rian@...m.mit.edu;
> jpoimboe@...hat.com; linux-kernel@...r.kernel.org; linux-
> doc@...r.kernel.org
> Subject: Re: [PATCH v9 00/13] arch/resctrl: AMD QoS support
> 
> 
> On Nov 21 2018 20:28:23, Moger, Babu wrote:
> >
> >This series adds support for AMD64 architectural extensions for
> >Platform Quality of Service.
> 
> The term "QoS" is already used for net/sched/. It will be bad naming to
> have QoS - and then an AMD QoS / Platform QoS as well. Preexisting,
> decade-old howtos may speak of enabling "QoS", and with the ambiguity,
> the unsuspecting kernel builder apprentice may enable the wrong thing in
> his config.
> 
> So either the QoS from networking gets correspondingly renamed ("packet
> QoS"?.. or something), or else AMD QoS should be changed.

The QoS name is not visible to the user. This feature is referred as QoS
in AMD documents. But for the kernel user it is called as RESCTRL which we
agreed upon in our earlier discussions. So there is no ambiguity  or
confusion here. Let me know if you have any questions.