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Date:   Mon, 31 Aug 2020 12:15:53 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Christian Borntraeger <borntraeger@de.ibm.com>
Cc:     Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-mm <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Alexander Gordeev <agordeev@linux.ibm.com>,
        linux-s390@vger.kernel.org, Heiko Carstens <hca@linux.ibm.com>,
        Claudio Imbrenda <imbrenda@linux.ibm.com>
Subject: Re: [RFC PATCH 0/2] mm/gup: fix gup_fast with dynamic page table
 folding
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        <9071c9fa-ba6a-90dc-2d7a-8b155141d890@de.ibm.com>
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On Mon, 31 Aug 2020 13:53:36 +0200 Christian Borntraeger <borntraeger@de.ibm.com> wrote:

> 
> 
> On 28.08.20 16:03, Gerald Schaefer wrote:
> have some feedback soon if option 1 or option 2 would be acceptable 
> from a common code perspective. Andrew, who of the mm people would 
> be the right one to decide?

Jason and John Hubbard are doing most of the work in there at present,

Both patches look OK to me from a non-s390 perspective.  Unless we plan
to implement Jason's more-general approach this time, I'd be inclined
to defer to the s390 people as to the preferred implementation.