RE: [PATCH] Fastwalk: reduce cacheline bouncing of d_count (Changelog@1.1024.1.11)

From: Marcelo Tosatti (
Date: Tue Jul 08 2003 - 14:24:54 EST

On Tue, 8 Jul 2003, Alan Cox wrote:

> On Maw, 2003-07-08 at 16:00, Trond Myklebust wrote:
> > ...but I do agree with your comment. The patch I meant to refer to
> > (see revised title) does not appear in the 2.5.x tree either.
> >
> > Have we BTW been shown any numbers that support the alleged benefits?
> > I may have missed those...
> A while ago yes - on very big SMP boxes.
> Its no big problem to me since I can just back it out of -ac


I included fastwalk patch because I thought it was a stable and very
useful optimisation. Even for 2.4. (I was expecting comments/flames on it
when I first included it.

Now if you think it is a 2.5 thing and can cause any potential problem for
2.4 I will remove it.
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