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SubjectRe: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U0

Ingo Molnar wrote:
> http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc4-mm1-U0

I notice:
+ local_irq_save(flags);
+ ____trace(&__get_cpu_var(trace), eip, parent_eip);
+ local_irq_restore(flags);

Why not use the lockless logging available in relayfs, you'll avoid the
interrupt disabling altogether since, umm ... it's lockless.

Karim
--
Author, Speaker, Developer, Consultant
Pushing Embedded and Real-Time Linux Systems Beyond the Limits
http://www.opersys.com || karim@opersys.com || 1-866-677-4546

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