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From: Andrew Morton <akpm@linux-foundation.org>
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Subject: Re: [Qemu-devel] [PATCH 00/23] userfaultfd v4
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To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>, zhang.zhanghailiang@huawei.com, kvm@vger.kernel.org, Pavel Emelyanov <xemul@parallels.com>, linux-api@vger.kernel.org, Johannes Weiner <hannes@cmpxchg.org>, Dave Hansen <dave.hansen@intel.com>, linux-kernel@vger.kernel.org, qemu-devel@nongnu.org, linux-mm@kvack.org, Andres Lagar-Cavilla <andreslc@google.com>, Mel Gorman <mgorman@suse.de>, Paolo Bonzini <pbonzini@redhat.com>, "Kirill A. Shutemov" <kirill@shutemov.name>, "Huangpeng (Peter)" <peter.huangpeng@huawei.com>, Sanidhya Kashyap <sanidhya.gatech@gmail.com>, Linus Torvalds <torvalds@linux-foundation.org>, Andy Lutomirski <luto@amacapital.net>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Peter Feiner <pfeiner@google.com>

On Thu, 14 May 2015 19:30:57 +0200 Andrea Arcangeli <aarcange@redhat.com> wrote:

> This is the latest userfaultfd patchset against mm-v4.1-rc3
> 2015-05-14-10:04.

It would be useful to have some userfaultfd testcases in
tools/testing/selftests/.  Partly as an aid to arch maintainers when
enabling this.  And also as a standalone thing to give people a
practical way of exercising this interface.

What are your thoughts on enabling userfaultfd for other architectures,
btw?  Are there good use cases, are people working on it, etc?


Also, I assume a manpage is in the works?  Sooner rather than later
would be good - Michael's review of proposed kernel interfaces has
often been valuable.