Re: [PATCH v4 6/7] x86/tlb: optimizing flush_tlb_mm

[Peter Zijlstra]

On Thu, 2012-05-10 at 13:00 +0800, Alex Shi wrote:
> Not every flush_tlb_mm execution moment is really need to evacuate all
> TLB entries, like in munmap, just few 'invlpg' is better for whole
> process performance, since it leaves most of TLB entries for later
> accessing.
> 
> This patch is changing flush_tlb_mm(mm) to flush_tlb_mm(mm, start, end)
> in cases.

No I thoroughly hate this patch. Please do something like:

 http://marc.info/?l=linux-arch&m=129952026504268&w=2

Afaict it achieves the same, doesn't mangle the tlb flush interfaces and
allows more arch to use generic code.
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