Re: [PATCH] Replace completions with semaphores

[Arjan van de Ven]

On Wed, 16 Apr 2008 18:31:08 +0200
Oliver Neukum <oliver@xxxxxxxxxx> wrote:

> 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. ÂIt'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?

yup. For kcounters there is a clear owner for each "slot".
[This is the part that makes it debugable again)

Now for non-debug builds, the space taken for the token can be.. zero 
depending on how we define the types for it.

> 
> 	Regards
> 		Oliver
> 
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