linux-kernel - Re: PROBLEM: 2.6.29.2 - AGP doesn't work anymore on my nforce2

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Date:	Mon, 4 May 2009 09:41:51 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	"kawime@....de" <kawime@....de>
Cc:	Jerome Glisse <glisse@...edesktop.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.sourceforge.net" <dri-devel@...ts.sourceforge.net>,
	Dave Airlie <airlied@...ux.ie>,
	"stable@...nel.org" <stable@...nel.org>
Subject: Re: PROBLEM: 2.6.29.2 - AGP doesn't work anymore on my nforce2

On Fri, May 01, 2009 at 09:22:19PM +0800, kawime@....de wrote:
> > On Thu, 2009-04-30 at 17:59 -0700, Andrew Morton wrote:
> >> On Thu, 30 Apr 2009 10:51:47 +0200
> >> Karsten Mehrhoff <kawime@....de> wrote:
> >>
> >>> [1.]
> >>> PROBLEM: No more agp card functionality with the patch 2.6.29.2 of  
> >> 'a/drivers/char/agp/generic.c'
> >>>
> >>> [2.]
> >>> I compiled the kernel 2.6.29.2 with my .config of 2.6.29.1 and run  
> >> into problems with the speed of my ATI RADEON 9600 (rv350)
> >>>
> >>
> >
> > Is your problem speed issue ? ie just a slowdown ? Or does AGP stop
> > working with this patch ? Slowdown is expected from this patch but
> > it should hurt too much.
> >
> 
>                         2.6.29.1  | 2.6.29.2
>                         --------  |  --------
> glxgears             ~ 2900 FPS  |  ~ 75 FPS
> glxgears -fullscreen ~  500 FPS  |  ~ 11 FPS
Does this patch alone give so huge slowdown? From my little knowledge, xserver
does agp pages allocation only at startup.
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