Re: IO queueing and complete affinity w/ threads: Some results

[Mike Travis]

Paul Jackson wrote:
> Jens wrote:
>> My main worry with the current code is the ->lock in the per-cpu
>> completion structure.
> 
> Drive-by-comment here:  Does the patch posted later this same day by Mike Travis:
> 
>   [PATCH 0/2] percpu: Optimize percpu accesses v3
> 
> help with this lock issue any?  (I have no real clue here -- just connecting
> up the pretty colored dots ;).
> 

I'm not sure of the context here but a big motivation for doing the
zero-based per_cpu variables was to optimize access to the local
per cpu variables to one instruction, reducing the need for locks.

-Mike
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