From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from mail-qc0-f182.google.com (mail-qc0-f182.google.com [209.85.216.182])
	by kanga.kvack.org (Postfix) with ESMTP id 09A636B0130
	for <linux-mm@kvack.org>; Tue, 11 Nov 2014 14:01:25 -0500 (EST)
Received: by mail-qc0-f182.google.com with SMTP id m20so8029275qcx.41
        for <linux-mm@kvack.org>; Tue, 11 Nov 2014 11:01:24 -0800 (PST)
Received: from resqmta-ch2-09v.sys.comcast.net (resqmta-ch2-09v.sys.comcast.net. [2001:558:fe21:29:69:252:207:41])
        by mx.google.com with ESMTPS id s2si38153826qar.44.2014.11.11.11.01.00
        for <linux-mm@kvack.org>
        (version=TLSv1.2 cipher=RC4-SHA bits=128/128);
        Tue, 11 Nov 2014 11:01:21 -0800 (PST)
Date: Tue, 11 Nov 2014 13:00:56 -0600 (CST)
From: Christoph Lameter <cl@linux.com>
Subject: Re: HMM (heterogeneous memory management) v6
In-Reply-To: <1415644096-3513-1-git-send-email-j.glisse@gmail.com>
Message-ID: <alpine.DEB.2.11.1411111259560.6657@gentwo.org>
References: <1415644096-3513-1-git-send-email-j.glisse@gmail.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: j.glisse@gmail.com
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds <torvalds@linux-foundation.org>, joro@8bytes.org, Mel Gorman <mgorman@suse.de>, "H. Peter Anvin" <hpa@zytor.com>, Peter Zijlstra <peterz@infradead.org>, Andrea Arcangeli <aarcange@redhat.com>, Johannes Weiner <jweiner@redhat.com>, Larry Woodman <lwoodman@redhat.com>, Rik van Riel <riel@redhat.com>, Dave Airlie <airlied@redhat.com>, Brendan Conoboy <blc@redhat.com>, Joe Donohue <jdonohue@redhat.com>, Duncan Poole <dpoole@nvidia.com>, Sherry Cheung <SCheung@nvidia.com>, Subhash Gutti <sgutti@nvidia.com>, John Hubbard <jhubbard@nvidia.com>, Mark Hairgrove <mhairgrove@nvidia.com>, Lucien Dunning <ldunning@nvidia.com>, Cameron Buschardt <cabuschardt@nvidia.com>, Arvind Gopalakrishnan <arvindg@nvidia.com>, Shachar Raindel <raindel@mellanox.com>, Liran Liss <liranl@mellanox.com>, Roland Dreier <roland@purestorage.com>, Ben Sander <ben.sander@amd.com>, Greg Stoner <Greg.Stoner@amd.com>, John Bridgman <John.Bridgman@amd.com>, Michael Mantor <Michael.Mantor@amd.com>, Paul Blinzer <Paul.Blinzer@amd.com>, Laurent Morichetti <Laurent.Morichetti@amd.com>, Alexander Deucher <Alexander.Deucher@amd.com>, Oded Gabbay <Oded.Gabbay@amd.com>, linux-fsdevel@vger.kernel.org, Linda Wang <lwang@redhat.com>, Kevin E Martin <kem@redhat.com>, Jerome Glisse <jglisse@redhat.com>, Jeff Law <law@redhat.com>, Haggai Eran <haggaie@mellanox.com>, Or Gerlitz <ogerlitz@mellanox.com>, Sagi Grimberg <sagig@mellanox.com>

On Mon, 10 Nov 2014, j.glisse@gmail.com wrote:

> In a nutshell HMM is a subsystem that provide an easy to use api to mirror a
> process address on a device with minimal hardware requirement (mainly device
> page fault and read only page mapping). This does not rely on ATS and PASID
> PCIE extensions. It intends to supersede those extensions by allowing to move
> system memory to device memory in a transparent fashion for core kernel mm
> code (ie cpu page fault on page residing in device memory will trigger
> migration back to system memory).

Could we define a new NUMA node that maps memory from the GPU and
then simply use the existing NUMA features to move a process over there.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>