linux-kernel - Re: [PATCH v2 00/25] AMDKFD kernel driver

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Message-ID: <20140721233613.GB6422@gmail.com>
Date:	Mon, 21 Jul 2014 19:36:14 -0400
From:	Jerome Glisse <j.glisse@...il.com>
To:	"Bridgman, John" <John.Bridgman@....com>
Cc:	"Gabbay, Oded" <Oded.Gabbay@....com>,
	"Lewycky, Andrew" <Andrew.Lewycky@....com>,
	"Pinchuk, Evgeny" <Evgeny.Pinchuk@....com>,
	"Daenzer, Michel" <Michel.Daenzer@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	linux-mm <linux-mm@...ck.org>,
	"Skidanov, Alexey" <Alexey.Skidanov@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 00/25] AMDKFD kernel driver

On Mon, Jul 21, 2014 at 11:29:23PM +0000, Bridgman, John wrote:
> >> >> So even if I really wanted to, and I may agree with you
> >> >> theoretically on that, I can't fulfill your desire to make the
> >> >> "kernel being able to preempt at any time and be able to decrease
> >> >> or increase user queue priority so overall kernel is in charge of
> >> >> resources management and it can handle rogue client in proper
> >> >> fashion". Not in KV, and I guess not in CZ as well.

                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

> >
> >Also it is a worrisome prospect of seeing resource management completely
> >ignore for future AMD hardware. Kernel exist for a reason ! Kernel main
> >purpose is to provide resource management if AMD fails to understand that,
> >this is not looking good on long term and i expect none of the HSA
> >technology will get momentum and i would certainly advocate against any
> >use of it inside product i work on.
> 
> Hi Jerome;
> 
> I was following along until the above comment. It seems to be the exact opposite of what Oded has been saying, which is that future AMD hardware *does* have more capabilities for resource management and that we do have some capabilities today. Can you help me understand what the comment it was based on ?


Highlighted above.

Cheers,
Jérôme
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