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Date: Fri, 31 Oct 2014 12:15:00 -0700
From: Peter Feiner <pfeiner@google.com>
Subject: Re: [PATCH 2/5] mm: gup: add __get_user_pages_unlocked to customize
 gup_flags
Message-ID: <20141031191500.GC38315@google.com>
References: <1414600520-7664-1-git-send-email-aarcange@redhat.com>
 <1414600520-7664-3-git-send-email-aarcange@redhat.com>
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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 05:35:17PM +0100, Andrea Arcangeli wrote:
> Some caller (like KVM) may want to set the gup_flags like
> FOLL_HWPOSION to get a proper -EHWPOSION retval instead of -EFAULT to
> take a more appropriate action if get_user_pages runs into a memory
> failure.
> 
> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Peter Feiner <pfeiner@google.com>

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