Message-ID: <ad13fb5a-1bca-3b4b-6f34-c1e7b12a1467@nvidia.com>
Date:   Tue, 21 Dec 2021 13:11:40 -0800
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Subject: Re: [PATCH v1 06/11] mm: support GUP-triggered unsharing via
 FAULT_FLAG_UNSHARE (!hugetlb)
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To:     David Hildenbrand <david@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Jason Gunthorpe <jgg@nvidia.com>, Nadav Amit <namit@vmware.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Hugh Dickins <hughd@google.com>,
        David Rientjes <rientjes@google.com>,
        Shakeel Butt <shakeelb@google.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>,
        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>,
        Linux-MM <linux-mm@kvack.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@vger.kernel.org>,
        "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>
References: <CAHk-=wj7eSOhbWDeADL_BJKLzdDF5s_5R9v7d-4P3L6v1T3mpQ@mail.gmail.com>
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From:   John Hubbard <jhubbard@nvidia.com>
In-Reply-To: <dda021c8-69ec-c660-46be-793ae345a5bb@redhat.com>
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On 12/21/21 10:28, David Hildenbrand wrote:
...
> I'd appreciate if someone could work on the O_DIRECT FOLL_PIN conversion
> while I struggle with PageAnonExclusive() and R/W pins :)
> 

Yes, I'll sign up for that (unless someone else who is faster is already
working on it). I've tried a couple times in the past, but without the
proper level of determination to see it through. So this time will be
different. :)

> [noting that I'll not get too much done within the next 2 weeks]
> 

Likewise. Starting in early January.


thanks,
-- 
John Hubbard
NVIDIA