linux-kernel - Re: [PATCH 00/23] userfaultfd v4

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Message-Id: <20150519143801.8ba477c3813e93a2637c19cf@linux-foundation.org>
Date:	Tue, 19 May 2015 14:38:01 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	qemu-devel@...gnu.org, kvm@...r.kernel.org,
	linux-api@...r.kernel.org, Pavel Emelyanov <xemul@...allels.com>,
	Sanidhya Kashyap <sanidhya.gatech@...il.com>,
	zhang.zhanghailiang@...wei.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Andres Lagar-Cavilla <andreslc@...gle.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Andy Lutomirski <luto@...capital.net>,
	Hugh Dickins <hughd@...gle.com>,
	Peter Feiner <pfeiner@...gle.com>,
	"Dr. David Alan Gilbert" <dgilbert@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	"Huangpeng (Peter)" <peter.huangpeng@...wei.com>
Subject: Re: [PATCH 00/23] userfaultfd v4

On Thu, 14 May 2015 19:30:57 +0200 Andrea Arcangeli <aarcange@...hat.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.

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