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Date: Fri, 31 Oct 2014 12:16:53 -0700
From: Peter Feiner <pfeiner@google.com>
Subject: Re: [PATCH 5/5] mm: gup: kvm use get_user_pages_unlocked
Message-ID: <20141031191653.GD38315@google.com>
References: <1414600520-7664-1-git-send-email-aarcange@redhat.com>
 <1414600520-7664-6-git-send-email-aarcange@redhat.com>
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In-Reply-To: <1414600520-7664-6-git-send-email-aarcange@redhat.com>
Sender: owner-linux-mm@kvack.org
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To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" <kirill@shutemov.name>, Michel Lespinasse <walken@google.com>, Andrew Jones <drjones@redhat.com>, Hugh Dickins <hughd@google.com>, Mel Gorman <mgorman@suse.de>, Andres Lagar-Cavilla <andreslc@google.com>, Minchan Kim <minchan@kernel.org>, KOSAKI Motohiro <kosaki.motohiro@gmail.com>, "\\\"Dr. David Alan Gilbert\\\"" <dgilbert@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, James Bottomley <James.Bottomley@HansenPartnership.com>, David Miller <davem@davemloft.net>, Steve Capper <steve.capper@linaro.org>, Johannes Weiner <jweiner@redhat.com>

On Wed, Oct 29, 2014 at 05:35:20PM +0100, Andrea Arcangeli wrote:
> Use the more generic get_user_pages_unlocked which has the additional
> benefit of passing FAULT_FLAG_ALLOW_RETRY at the very first page fault
> (which allows the first page fault in an unmapped area to be always
> able to block indefinitely by being allowed to release the mmap_sem).
> 
> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Peter Feiner <pfeiner@google.com>

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