Re: [linux-audio-dev] low-latency scheduling patch for 2.4.0

David S. Miller
2001-01-11T21:31:42Z

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.

Later,
David S. Miller
davem@redhat.com