Re: [Intel-gfx] [PATCH 01/14] drm/i915/hangcheck: Track context changes

2019-05-03 Thread Chris Wilson
Quoting Tvrtko Ursulin (2019-05-03 11:36:55) > > On 01/05/2019 12:45, Chris Wilson wrote: > > Given sufficient preemption, we may see a busy system that doesn't > > advance seqno while performing work across multiple contexts, and given > > sufficient pathology not even notice a change in ACTHD. W

Re: [Intel-gfx] [PATCH 01/14] drm/i915/hangcheck: Track context changes

2019-05-03 Thread Tvrtko Ursulin
On 01/05/2019 12:45, Chris Wilson wrote: Given sufficient preemption, we may see a busy system that doesn't advance seqno while performing work across multiple contexts, and given sufficient pathology not even notice a change in ACTHD. What does change between the preempting contexts is their RI

[Intel-gfx] [PATCH 01/14] drm/i915/hangcheck: Track context changes

2019-05-01 Thread Chris Wilson
Given sufficient preemption, we may see a busy system that doesn't advance seqno while performing work across multiple contexts, and given sufficient pathology not even notice a change in ACTHD. What does change between the preempting contexts is their RING, so take note of that and treat a change