Re: Fw: framebuffer blitting performance loss 2.6.12 -> 2.6.13-rc3

[Andrew Morton <akpm@osdl.org>]

"Antonino A. Daplas" <adaplas@gmail.com> wrote:
>
> On Friday 15 July 2005 18:39, Andrew Morton wrote:
> > Begin forwarded message:
> >
> > Date: Fri, 15 Jul 2005 12:14:37 +0200
> > From: Knut Petersen <Knut_Petersen@t-online.de>
> > To: linux-kernel@vger.kernel.org
> > Subject: framebuffer blitting performance loss  2.6.12 -> 2.6.13-rc3
> >
> >
> > Hi everybody!
> >
> > There is a serious performance loss between 2.6.12 and 2.6.13-rc3
> > affecting _all_ framebuffer devices, especially those with fast
> > bitblit functions.
> >
> 
> I haven't seen any significant performance penalty, between 2.6.12-rc5-mm1
> and 2.6.13-rc3-mm1.
> 
> Based on your results, I would pinpoint the culprit to be in
> video/console/bitblit.c.  However, the changes there are minor, and should not
> alter the peformance.
> 

So.. what happened here?  Is the problem still present in 2.6.13-rc4?


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