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Date: Thu, 9 Dec 2021 12:45:24 +1100 From: Alistair Popple <apopple@...dia.com> To: Jason Gunthorpe <jgg@...pe.ca> CC: <akpm@...ux-foundation.org>, <Felix.Kuehling@....com>, <linux-mm@...ck.org>, <rcampbell@...dia.com>, <linux-ext4@...r.kernel.org>, <linux-xfs@...r.kernel.org>, Alex Sierra <alex.sierra@....com>, <amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>, <hch@....de>, <jglisse@...hat.com>, <willy@...radead.org> Subject: Re: [PATCH v2 03/11] mm/gup: migrate PIN_LONGTERM dev coherent pages to system On Thursday, 9 December 2021 12:53:45 AM AEDT Jason Gunthorpe wrote: > > I think a similar problem exists for device private fault handling as well and > > it has been on my list of things to fix for a while. I think the solution is to > > call try_get_page(), except it doesn't work with device pages due to the whole > > refcount thing. That issue is blocking a fair bit of work now so I've started > > looking into it. > > Where is this? Nothing posted yet. I've been going through the mailing list and the old thread[1] to get an understanding of what is left to do. If you have any suggestions they would be welcome. [1] https://lore.kernel.org/all/20211014153928.16805-3-alex.sierra@amd.com/
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