linux-kernel - Re: [RFC][PATCH v3 1/6] mm: Don't unmap gup()ed page

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Date:	Tue, 14 Apr 2009 16:32:52 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>,
	Andrew Morton <akpm@...l.org>, Jeff Moyer <jmoyer@...hat.com>,
	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	Hugh Dickins <hugh@...itas.com>
Subject: Re: [RFC][PATCH v3 1/6] mm: Don't unmap gup()ed page

On Wed, Apr 15, 2009 at 12:26:34AM +1000, Nick Piggin wrote:
> Andrea: I didn't veto that set_bit change of yours as such. I just

I know you didn't ;)

> noted there could be more atomic operations. Actually I would
> welcome more comparison between our two approaches, but they seem

Agree about the welcome of comparison, it'd be nice to measure it the
enterprise workloads that showed the gup_fast gain in the first place.
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