Re: [PATCH] Abstracted Priority Inheritance for RT

[Esben Nielsen]

On Wed, 1 Jun 2005, Daniel Walker wrote:

> 
> 
> On Wed, 1 Jun 2005, Ingo Molnar wrote:
> 
> > i'd rather not slow things down by callbacks and other abstraction 
> > before seeing how things want to integrate in fact. Do we really need 
> > the callbacks?
> 
> I think it would be hard to do without a way to signal when a waiter
> changes priorties.

Do you plan to use that callback for priority inheritance?
If so: It would lead to an recursive algorithm. That is not very nice in
the kernel with a limited call-stack. It is not so much a problem if the
mechanism is used in the kernel only, but if it is used for user-space
locking, which can have unlimited neesting, it is potential problem.

Esben

> [...] 
> 
> Daniel
> 

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