linux-kernel - Re: [PATCH] Replace completions with semaphores

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Message-Id: <200804161831.10510.oliver@neukum.org>
Date:	Wed, 16 Apr 2008 18:31:08 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Ingo Oeser <ioe-lkml@...eria.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Bart Van Assche <bart.vanassche@...il.com>,
	Roland Dreier <rdreier@...co.com>, Ingo Molnar <mingo@...e.hu>,
	Daniel Walker <dwalker@...sta.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Replace completions with semaphores

Am Mittwoch, 16. April 2008 18:16:52 schrieb Matthew Wilcox:
> The basic idea is that you get back a cookie from the kcounter_claim()
> which you have to hand to the kcounter_release() function so it
> knows which one you released.  It's similar to mutex debugging except

So in addition to the kcounter we need to save a token in a data structure?
In fact, there must be a data structure that can house that token. So you
can no longer live with a pointer just to a device descriptor, but every
individual use of a resource must have an associated data structure?

	Regards
		Oliver

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