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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-10-07 09:53:24 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-10-07 10:27:22 +0300 |
| commit | 8687b3ec852e89630bac650f15136811c7b4c1dc (patch) | |
| tree | ff72a72810fb382494450e46cd30a4a7eed02421 /drivers/gpu/drm/i915/intel_ringbuffer.h | |
| parent | 69a44b16cba895ff761c1763508c271a084950b5 (diff) | |
| download | linux-8687b3ec852e89630bac650f15136811c7b4c1dc.tar.xz | |
drm/i915: Distinguish last emitted request from last submitted request
In order not to trigger hangcheck on a idle-but-waiting engine, we need
to distinguish between the pending request queue and the actual
execution queue. This is done later in "drm/i915: Enable multiple
timelines" but for now we need a temporary fix to prevent blaming the
wrong engine for a GPU hang.
(Note that this causes a temporary subtle change in how we decide when
to allow a waitboost to be re-awarded back to the waiter, the temporary
effect is that if the wait is upon the most current execution the wait
is given for free, instead of checking to see if the client stalled
itself. This will be repaired in "drm/i915: Enable multiple timelines".)
Fixes: 0a046a0e93d2 ("drm/i915: Nonblocking request submission")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98104
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161007065327.24515-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 498931f0b1f1..34954ca03a4a 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -355,6 +355,7 @@ struct intel_engine_cs { * inspecting request list. */ u32 last_submitted_seqno; + u32 last_pending_seqno; /* An RCU guarded pointer to the last request. No reference is * held to the request, users must carefully acquire a reference to |