[Nouveau] [RFC PATCH 5/5] drm/nouveau: gpu lockup recovery

[Christoph Bumiller]

On 04/23/2012 06:32 PM, Marcin Slusarz wrote:
> You can run fs-discard-exit-2 test first - for me it causes instant GPU lockup.
> 

That's because it's designed (but not supposed) to do that, it also
locks up with the blob, it's a harmless shader infinite loop.

(May be a bug in the MPs or a wrong setting somewhere, but they don't
pop the control flow stack if all but killed pixels of a partially
killed quad remain on the current execution path).

Activated the watchdog on nv50 now, too, if you want to produce the
lockup with current mesa git run with NOUVEAU_SHADER_WATCHDOG=0 (yes
when we use COMPUTE it will have to be deactivated as well).

> Marcin
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