Re: TLB flush counters gone in 2.5.35-bk?

Andrew Morton (akpm@digeo.com)
Tue, 17 Sep 2002 13:55:49 -0700

Roberto Nibali wrote:
>
> Hello,
>
> I was just browsing over the latest bk tree when I saw the following change:
>
> ...
> - unsigned long flushes;/* stats: count avoided flushes */
> - unsigned long avoided_flushes;

That was some statistical/debug code to evaluate how useful
that particular optimisation was being. Answer: it saves
30-35% of the global TLB invalidations coming out of there.

But it had served its purpose.
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