On Thu, 4 Jan 2001, Andi Kleen wrote:
> The problem is that current Linux semaphores are very costly locks -- they
> always cause a context switch.
My preemptible kernel patch currently just uses Linux semaphores to
implement sleeping kernel mutexes, but we (at MontaVista Software) are
working on a new implementation that also does priority inheritance,
to avoid the priority inversion problem, and that does the minimum
necessary context switches.
Nigel Gamble nigel@nrg.org
Mountain View, CA, USA. http://www.nrg.org/
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This archive was generated by hypermail 2b29 : Sun Jan 07 2001 - 21:00:19 EST