Commits
Chris Wilson committed 4f6d8fcf1a5
drm/i915: Flush submission tasklet after bumping priority When called from process context tasklet_schedule() defers itself to ksoftirqd. From experience this may cause unacceptable latencies of over 200ms in executing the submission tasklet, our goal is to reprioritise the HW execution queue and trigger HW preemption immediately, so disable bh over the call to schedule and force the tasklet to run afterwards if scheduled. v2: Keep rcu_read_lock() around for PREEMPT_RCU 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> Link: https://patchwork.freedesktop.org/patch/msgid/20180507135731.10587-1-chris@chris-wilson.co.uk Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>