linux-kernel - Re: [Bug #11875] radeonfb lockup in .28-rc (bisected)

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Date:	Thu, 13 Nov 2008 19:04:47 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	benh@...nel.crashing.org
Cc:	rjw@...k.pl, linux-kernel@...r.kernel.org,
	kernel-testers@...r.kernel.org, akpm@...ux-foundation.org,
	cloos@...loos.com, paul@...ly.ondioline.org,
	torvalds@...ux-foundation.org
Subject: Re: [Bug #11875] radeonfb lockup in .28-rc (bisected)

From: David Miller <davem@...emloft.net>
Date: Thu, 13 Nov 2008 18:50:59 -0800 (PST)

> From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Date: Fri, 14 Nov 2008 11:54:20 +1100
> 
> > How does it compare with not having the acceleration ?
> 
> I'll find out for you.

It makes a huge difference, with the acceleration patch:

commit b1ee26bab14886350ba12a5c10cbc0696ac679bf
Author: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Date:   Wed Oct 15 22:03:46 2008 -0700

    radeonfb: accelerate imageblit and other improvements

reverted, the test case takes 25 seconds or more instead of
the 7 or 8 seconds we're seeing now.
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