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Message-ID: <9781c7e7-d84e-4911-396b-718514f76b1f@redhat.com>
Date:   Fri, 29 Apr 2022 20:56:02 +0200
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Subject: Re: [PATCH v4 12/17] mm: remember exclusively mapped anonymous pages
 with PG_anon_exclusive
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To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     linux-kernel@vger.kernel.org, Hugh Dickins <hughd@google.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        David Rientjes <rientjes@google.com>,
        Shakeel Butt <shakeelb@google.com>,
        John Hubbard <jhubbard@nvidia.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Mike Rapoport <rppt@linux.ibm.com>,
        Yang Shi <shy828301@gmail.com>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Matthew Wilcox <willy@infradead.org>,
        Vlastimil Babka <vbabka@suse.cz>, Jann Horn <jannh@google.com>,
        Michal Hocko <mhocko@kernel.org>,
        Nadav Amit <namit@vmware.com>, Rik van Riel <riel@surriel.com>,
        Roman Gushchin <guro@fb.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Peter Xu <peterx@redhat.com>,
        Donald Dutile <ddutile@redhat.com>,
        Christoph Hellwig <hch@lst.de>,
        Oleg Nesterov <oleg@redhat.com>, Jan Kara <jack@suse.cz>,
        Liang Zhang <zhangliang5@huawei.com>,
        Pedro Gomes <pedrodemargomes@gmail.com>,
        Oded Gabbay <oded.gabbay@gmail.com>, linux-mm@kvack.org
References: <20220428083441.37290-1-david@redhat.com>
 <20220428083441.37290-13-david@redhat.com>
 <20220429112655.6b44dae1a93a9aa93adb0bcf@linux-foundation.org>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
In-Reply-To: <20220429112655.6b44dae1a93a9aa93adb0bcf@linux-foundation.org>
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On 29.04.22 20:26, Andrew Morton wrote:
> On Thu, 28 Apr 2022 10:34:36 +0200 David Hildenbrand <david@redhat.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