RE: [PATCH v4 00/10] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping

From: "Deucher, Alexander" <Alexander.Deucher@amd.com>
To: "Sierra Guiza, Alejandro (Alex)" <Alex.Sierra@amd.com>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: "Kuehling, Felix" <Felix.Kuehling@amd.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"rcampbell@nvidia.com" <rcampbell@nvidia.com>,
	"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
	"linux-xfs@vger.kernel.org" <linux-xfs@vger.kernel.org>,
	"amd-gfx@lists.freedesktop.org" <amd-gfx@lists.freedesktop.org>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>, "hch@lst.de" <hch@lst.de>,
	"jgg@nvidia.com" <jgg@nvidia.com>,
	"jglisse@redhat.com" <jglisse@redhat.com>,
	"apopple@nvidia.com" <apopple@nvidia.com>,
	"willy@infradead.org" <willy@infradead.org>
Subject: RE: [PATCH v4 00/10] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping
Date: Fri, 28 Jan 2022 15:00:54 +0000	[thread overview]
Message-ID: <BL1PR12MB5144C93A17CF84DF88FF6C52F7229@BL1PR12MB5144.namprd12.prod.outlook.com> (raw)
In-Reply-To: <6434ba24-a219-6a5a-d902-0b48974a0e43@amd.com>

[Public]

> -----Original Message-----
> From: Sierra Guiza, Alejandro (Alex) <Alex.Sierra@amd.com>
> Sent: Thursday, January 27, 2022 6:21 PM
> To: Andrew Morton <akpm@linux-foundation.org>
> Cc: Kuehling, Felix <Felix.Kuehling@amd.com>; linux-mm@kvack.org;
> rcampbell@nvidia.com; linux-ext4@vger.kernel.org; linux-
> xfs@vger.kernel.org; amd-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org; hch@lst.de; jgg@nvidia.com;
> jglisse@redhat.com; apopple@nvidia.com; willy@infradead.org; Deucher,
> Alexander <Alexander.Deucher@amd.com>
> Subject: Re: [PATCH v4 00/10] Add MEMORY_DEVICE_COHERENT for
> coherent device memory mapping
> 
> Andrew,
> We're somehow new on this procedure. Are you referring to rebase this
> patch series to git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-
> next.git
> <5.17-rc1 tag>?
> 
> Regards,
> Alex Sierra
> 
> Alex Deucher,
> Just a quick heads up. This patch series contains changes to the amdgpu
> driver which we're planning to merge through Andrew's tree, If that's ok with
> you.

No problem.

Thanks!

Alex

> 
> Regards,
> Alex Sierra
> 
> On 1/27/2022 4:32 PM, Andrew Morton wrote:
> > On Wed, 26 Jan 2022 21:09:39 -0600 Alex Sierra <alex.sierra@amd.com>
> wrote:
> >
> >> This patch series introduces MEMORY_DEVICE_COHERENT, a type of
> memory
> >> owned by a device that can be mapped into CPU page tables like
> >> MEMORY_DEVICE_GENERIC and can also be migrated like
> >> MEMORY_DEVICE_PRIVATE.
> > Some more reviewer input appears to be desirable here.
> >
> > I was going to tentatively add it to -mm and -next, but problems.
> > 5.17-rc1's mm/migrate.c:migrate_vma_check_page() is rather different
> > from the tree you patched.  Please redo, refresh and resend?
> >