linux-kernel - Re: [PATCH 0/3] 64-bit futexes: Intro

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Date:	Sat, 31 May 2008 15:32:01 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ulrich Drepper <drepper@...hat.com>
cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	mtk.manpages@...il.com
Subject: Re: [PATCH 0/3] 64-bit futexes: Intro

On Sat, 31 May 2008, Linus Torvalds wrote:
>
> 	 * Note that we don't need to update the high bits if we
> 	 * succeed (because the writer count is the _pending_ writer
> 	 * count, not the holding one)

Btw, that comment is bogus, ignore it. It comes from an earlier algorithm 
I tried that also explained the contention case, but got unnecessarily 
complex. Separating out the queuing behaviour from the actual 
non-contended behaviour made things much simpler to explain, so I stopped 
even bothering with a "both" case.

Too much cut-and-paste, IOW.

		Linus
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