Re: [PATCH 1/1] SGI X86 UV: Provide a System Activity Indicator driver

[Mike Travis]

Ingo Molnar wrote:
> * Mike Travis <travis@xxxxxxx> wrote:
> 
>>  arch/x86/kernel/genx2apic_uv_x.c |  138 +++++++++++++++++++++++++++++++++++++++
>>  include/asm-x86/uv/uv_hub.h      |   62 +++++++++++++++++
> 
> hm, why is this in genx2apic_uv_x.c, not a separate file?

This keeps it in the uv_hub percpu area, a chunk of memory that is accessed
quite often for many of the basic UV operations.  This should increase the
probability that the data is already located in the cpu's cache.

Thanks,
Mike

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