linux-kernel - Re: [PATCH 2/5] mm: gup: add __get_user_pages_unlocked to customize gup

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Message-ID: <20150116125142.GD29085@node.dhcp.inet.fi>
Date:	Fri, 16 Jan 2015 14:51:42 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Michel Lespinasse <walken@...gle.com>,
	Andrew Jones <drjones@...hat.com>,
	Hugh Dickins <hughd@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Andres Lagar-Cavilla <andreslc@...gle.com>,
	Minchan Kim <minchan@...nel.org>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	"\\\"Dr. David Alan Gilbert\\\"" <dgilbert@...hat.com>,
	Peter Feiner <pfeiner@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	David Miller <davem@...emloft.net>,
	Steve Capper <steve.capper@...aro.org>,
	Johannes Weiner <jweiner@...hat.com>
Subject: Re: [PATCH 2/5] mm: gup: add __get_user_pages_unlocked to customize
 gup_flags

On Tue, Jan 13, 2015 at 05:37:51PM +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@...hat.com>

Reviewed-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

-- 
 Kirill A. Shutemov
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