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Message-ID: <20220215183209.GA24409@lst.de> Date: Tue, 15 Feb 2022 19:32:09 +0100 From: Christoph Hellwig <hch@....de> To: Jason Gunthorpe <jgg@...dia.com> Cc: David Hildenbrand <david@...hat.com>, Felix Kuehling <felix.kuehling@....com>, Alex Sierra <alex.sierra@....com>, akpm@...ux-foundation.org, linux-mm@...ck.org, rcampbell@...dia.com, linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, hch@....de, jglisse@...hat.com, apopple@...dia.com, willy@...radead.org Subject: Re: [PATCH v6 01/10] mm: add zone device coherent type memory support On Tue, Feb 15, 2022 at 10:45:24AM -0400, Jason Gunthorpe wrote: > > Do you know if DEVICE_GENERIC pages would end up as PageAnon()? My > > assumption was that they would be part of a special mapping. > > We need to stop using the special PTEs and VMAs for things that have a > struct page. This is a mistake DAX created that must be undone. Yes, we'll get to it. Maybe we can do it for the non-DAX devmap ptes first given that DAX is more complicated.
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