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SubjectRe: [linux-audio-dev] low-latency scheduling patch for 2.4.0
"David S. Miller" wrote:
> Nigel Gamble writes:
> > That's why MontaVista's kernel preemption patch uses sleeping mutex
> > locks instead of spinlocks for the long held locks.
> Anyone who uses sleeping mutex locks is asking for trouble. Priority
> inversion is an issue I dearly hope we never have to deal with in the
> Linux kernel, and sleeping SMP mutex locks lead to exactly this kind
> of problem.
Exactly why we are going to us priority inherit mutexes. This handles
the inversion nicely.

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