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Date: Tue, 17 Sep 2002 13:55:49 -0700
From: Andrew Morton <akpm@digeo.com>
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To: Roberto Nibali <ratz@drugphish.ch>
CC: linux-kernel@vger.kernel.org
Subject: Re: TLB flush counters gone in 2.5.35-bk?
References: <3D874DA1.20803@drugphish.ch>
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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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