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Date: Mon, 14 Apr 2008 20:16:39 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>, Roland Dreier <rdreier@cisco.com>,
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       Ingo Oeser <ioe-lkml@rameria.de>, Daniel Walker <dwalker@mvista.com>,
       linux-kernel@vger.kernel.org, Linus Torvalds <torvalds@osdl.org>
Subject: Re: [PATCH] Replace completions with semaphores
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> Because we can then eventually get rid of semaphores, so those people
> cannot mistakenly use them. Its just too easy to create prio inversion
> with them around.

And it'll be far harder to even find the priority inversion problems in
the open coded alternatives.