Re: [PATCH RT 00/02] SLOB optimizations

Ingo Molnar a écrit :

CLI/STI is extremely fast. (In fact in the -rt tree i'm using them within mutexes instead of preempt_enable()/preempt_disable(), because they are faster and generate less register side-effect.)

Yes, but most of my machines have a ! CONFIG_PREEMPT kernel, so preempt_enable()/preempt_disable() are empty, thus faster than CLI/STI for sure :)

Then, maybe the patch that moves 'current' in a dedicated x86_64 register may help to lower the cost of preempt_enable()/preempt_disable() on a CONFIG_PREEMPT kernel ?

Eric
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