[Bug 54226] [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54226

--- Comment #94 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #93)
> Created attachment 82773 [details]
> i915_error_state with new patch
> 
> (In reply to comment #92)
> > Created attachment 82768 [details] [review] [review]
> > New read-after-write patch
> > 
> > Oops, my mistake, please try again.
> 
> Now loading, but after five minutes test:
> 793485 Jul 21 17:32:56 localhost kernel: [  321.432882] hda-intel
> 0000:00:1b.0: Unstable LPIB (32740 >= 4096); disabling LPIB delay counting
> 793486 Jul 21 17:34:49 localhost kernel: [  434.291085]
> [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
> 793487 Jul 21 17:34:49 localhost kernel: [  434.291088] [drm] capturing
> error event; look for more information in
> /sys/kernel/debug/dri/0/i915_error_state
> 793488 Jul 21 17:34:49 localhost kernel: [  434.307124]
> [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0xbfe2000
> ctx 1) at 0xbfe21dc

That is a blorp (mesa/i965) bug and not the semaphore deadlock.

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