DMA IRQ ping-pong

[Michel Dänzer]

On Wed, 2008-01-02 at 11:32 +0100, Xavier Bestel wrote:
> 
> I have an ATI radeon 9600 XT, and I'm tracking the debian experimental
> driver (last version is 1:6.7.198~git20080101.f65374f5-1). I still have
> some random lockups, but they are few and far between (say once or twice
> a week), so not so easy to track.
> 
> On strange thing I have observed in the log is that the DMA IRQ
> allocated varies between the runs. Here's the diff between the last two
> logs:
> -(II) RADEON(0): [drm] dma control initialized, using IRQ 17
> +(II) RADEON(0): [drm] dma control initialized, using IRQ 16
> 
> This time the version changed, but sometimes just a reboot can trigger
> this. It's always IRQ 16 or 17.
> 
> Is that ok ?

Should be, so long as it matches the line assigned to the graphics
card... but if it didn't, 3D apps would probably hit IRQ timeouts
immediately.


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer