The state of realtime Linux
Posted Jun 17, 2010 15:54 UTC (Thu) by shane
Parent article: The state of realtime Linux
So the realtime patch set currently puts a lock around per-CPU data accesses, eliminating the preemption problem but wrecking scalability. Here, too, a real solution has not yet been found.
It sounds like what is needed is a way to direct the kernel that a task can be pre-empted but not manipulated in a way that is unsafe for pre-CPU state.
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