Messages in this thread | | | Date | Wed, 1 Jun 2005 16:07:03 +0200 (METDST) | From | Esben Nielsen <> | Subject | Re: [PATCH] Abstracted Priority Inheritance for RT |
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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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