On Sat, 31 May 2008, Linus Torvalds wrote:
quoted text
>
> 	 * 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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