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drm/i915: Defer declaration of missed-interrupt until the waiter is asleep

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If the waiter was currently running, assume it hasn't had a chance
to process the pending interrupt (e.g, low priority task on a loaded
system) and wait until it sleeps before declaring a missed interrupt.

References: https://bugs.freedesktop.org/show_bug.cgi?id=99816
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170217151304.16665-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-02-17 15:13:02 +00:00
parent c33ed067d1
commit 8998567b51
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/i915/intel_breadcrumbs.c
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@ -45,6 +45,15 @@ static void intel_breadcrumbs_hangcheck(unsigned long data)
return;
}
/* If the waiter was currently running, assume it hasn't had a chance
* to process the pending interrupt (e.g, low priority task on a loaded
* system) and wait until it sleeps before declaring a missed interrupt.
*/
if (!intel_engine_wakeup(engine)) {
mod_timer(&b->hangcheck, wait_timeout());
return;
}
DRM_DEBUG("Hangcheck timer elapsed... %s idle\n", engine->name);
set_bit(engine->id, &engine->i915->gpu_error.missed_irq_rings);
mod_timer(&engine->breadcrumbs.fake_irq, jiffies + 1);