Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [patch 1/14] mm: opt rmqueue | Date | Mon, 7 Nov 2005 04:23:44 +0100 |
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On Monday 07 November 2005 02:06, Nick Piggin wrote:
> Yes, all this turning on and off of interrupts does have a > significant cost here.
How did you find out?
> > With the full patchset applied, most of the hot path statistics > get put under areas that already require interrupts to be off, > however there are still a few I didn't get around to doing. > zone_statistics on CONFIG_NUMA, for example.
These should just be local_t
> > I wonder if local_t is still good on architectures like ppc64 > where it still requires an ll/sc sequence?
The current default fallback local_t doesn't require that. It uses different fields indexed by !!in_interrupt()
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