linux-kernel - Re: [PATCH v4 12/17] mm: remember exclusively mapped anonymous pages with PG_anon

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Message-ID: <9781c7e7-d84e-4911-396b-718514f76b1f@redhat.com>
Date:   Fri, 29 Apr 2022 20:56:02 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Hugh Dickins <hughd@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        David Rientjes <rientjes@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        John Hubbard <jhubbard@...dia.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Yang Shi <shy828301@...il.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Matthew Wilcox <willy@...radead.org>,
        Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
        Michal Hocko <mhocko@...nel.org>,
        Nadav Amit <namit@...are.com>, Rik van Riel <riel@...riel.com>,
        Roman Gushchin <guro@...com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Donald Dutile <ddutile@...hat.com>,
        Christoph Hellwig <hch@....de>,
        Oleg Nesterov <oleg@...hat.com>, Jan Kara <jack@...e.cz>,
        Liang Zhang <zhangliang5@...wei.com>,
        Pedro Gomes <pedrodemargomes@...il.com>,
        Oded Gabbay <oded.gabbay@...il.com>, linux-mm@...ck.org
Subject: Re: [PATCH v4 12/17] mm: remember exclusively mapped anonymous pages
 with PG_anon_exclusive

On 29.04.22 20:26, Andrew Morton wrote:
> On Thu, 28 Apr 2022 10:34:36 +0200 David Hildenbrand <david@...hat.com> wrote:
> 
>> Let's mark exclusively mapped anonymous pages with PG_anon_exclusive as
>> exclusive, and use that information to make GUP pins reliable and stay
>> consistent with the page mapped into the page table even if the
>> page table entry gets write-protected.
> 
> No reviewers on this one?
> 
> 

Looks like I missed Vlastimils ACK on this one in his second reply:

https://lkml.kernel.org/r/abc33620-b0dc-67e3-d3a9-2094475bf16e@suse.cz

-- 
Thanks,

David / dhildenb