Re: [PATCH RESEND percpu#for-next] percpu: align percpu readmostlysubsection to cacheline

[Shaohua Li]

On Mon, 2010-12-27 at 21:37 +0800, Tejun Heo wrote:
> Currently percpu readmostly subsection may share cachelines with other
> percpu subsections which may result in unnecessary cacheline bounce
> and performance degradation.
> 
> This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR()
> linker macros, makes each arch linker scripts specify its cacheline
> size and use it to align percpu subsections.
> 
> This is based on Shaohua's x86 only patch.
> 
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Shaohua Li <shaohua.li@xxxxxxxxx>
> ---
> Shaohua, can you please verify this achieves the same result?  If no
> one objects, I'll route it through the percpu tree.
yes, the x86 part works.

Thanks,
Shaohua

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