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From: Marcelo Tosatti <marcelo@conectiva.com.br>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: trond.myklebust@fys.uio.no, hannal@us.ibm.com,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux FSdevel <linux-fsdevel@vger.kernel.org>
Subject: RE: [PATCH] Fastwalk: reduce cacheline bouncing of d_count (Changelog@1.1024.1.11)
Date: Tue, 8 Jul 2003 16:24:54 -0300 (BRT)	[thread overview]
Message-ID: <Pine.LNX.4.55L.0307081623100.21575@freak.distro.conectiva> (raw)
In-Reply-To: <1057677613.4358.33.camel@dhcp22.swansea.linux.org.uk>



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

Alan,

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.

  parent reply	other threads:[~2003-07-08 19:15 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-08 14:04 [PATCH] path_lookup for 2.4.20-pre4 (ChangeSet@1.587.10.71) Trond Myklebust
2003-07-08 14:16 ` Alan Cox
2003-07-08 15:00   ` [PATCH] Fastwalk: reduce cacheline bouncing of d_count (Changelog@1.1024.1.11) Trond Myklebust
2003-07-08 15:20     ` Alan Cox
2003-07-08 16:44       ` Herbert Poetzl
2003-07-08 16:53         ` Alan Cox
2003-07-08 17:06           ` Herbert Poetzl
2003-07-08 17:20             ` Matthew Wilcox
2003-07-08 17:42               ` Hanna Linder
2003-07-08 18:10                 ` Trond Myklebust
2003-07-08 18:19                   ` Hanna Linder
2003-07-08 19:26           ` Marcelo Tosatti
2003-07-08 19:24       ` Marcelo Tosatti [this message]
2003-07-08 16:20 ` [PATCH] path_lookup for 2.4.20-pre4 (ChangeSet@1.587.10.71) Jan Harkes
2003-07-08 16:41   ` [PATCH] Fastwalk: reduce cacheline bouncing of d_count (Changelog@1.1024.1.11) Trond Myklebust

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