Re: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U8

[john cooper]

Ingo Molnar wrote:

> * Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
>
>
> > Yeah, for a semaphore it is, but not for a mutex.
>
> but mutexes dont exist in upstream Linux as a separate entity. (they
> exist in my tree but that's another ballgame.)
Mutexes layered on existing semaphores seems convenient
at the moment. However a more native mutex mechanism
which tracks ownership would provide a basis for PI as
well as further instrumentation. This may not be an
issue at the present but I don't think it is too far
off.

-john




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john.cooper@xxxxxxxxxxx

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