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Date: Thu, 17 Aug 2017 14:12:45 -0700
From: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [HMM-v25 13/19] mm/migrate: new migrate mode
 MIGRATE_SYNC_NO_COPY
Message-Id: <20170817141245.93cfb315cfc598ff86928639@linux-foundation.org>
In-Reply-To: <20170817000548.32038-14-jglisse@redhat.com>
References: <20170817000548.32038-1-jglisse@redhat.com>
	<20170817000548.32038-14-jglisse@redhat.com>
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To: =?ISO-8859-1?Q?J=E9r=F4me?= Glisse <jglisse@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, John Hubbard <jhubbard@nvidia.com>, Dan Williams <dan.j.williams@intel.com>, David Nellans <dnellans@nvidia.com>, Balbir Singh <bsingharora@gmail.com>

On Wed, 16 Aug 2017 20:05:42 -0400 J__r__me Glisse <jglisse@redhat.com> wrote:

> Introduce a new migration mode that allow to offload the copy to
> a device DMA engine. This changes the workflow of migration and
> not all address_space migratepage callback can support this. So
> it needs to be tested in those cases.

Can you please expand on this?  What additional testing must be
performed before we are able to merge this into mainline?

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