linux-kernel - Re: [PATCH 0/4] futex: get_user_pages

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Message-ID: <20080927161712.GA1525@elte.hu>
Date:	Sat, 27 Sep 2008 18:17:12 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Eric Dumazet <dada1@...mosbay.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 0/4] futex: get_user_pages_fast() for shared futexes


* Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> Since get_user_pages_fast() made it in, I thought to give this another 
> try. Lightly tested by disabling the private futexes and running some 
> java proglets.

hm, very interesting. Since this is an important futex usecase i started 
testing it in tip/core/futexes:

 cd33272: futex: cleanup fshared
 a135356: futex: use fast_gup()
 39ce77b: futex: reduce mmap_sem usage
 0d7a336: futex: rely on get_user_pages() for shared futexes

Nick, it would be nice to get an Acked-by/Reviewed-by from you, before 
we think about whether it should go upstream.

	Ingo
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