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drm/i915: Bump priority of clean up work 

We require that we keep the list of outstanding work short so that we do
not "leak" memory while pageflipping under stress. However that system
stress may delay kernel workers virtually indefinitely, which incurs the
pageflips stall and eventually hit a timeout waiting for the cleanup.

Try to combat CPU starvation of our short-lived cleanup workers by
switching to a high priority workqueue.

Testcase: igt/kms_cursor_legacy/all-pipes-torture-move
References: https://bugs.freedesktop.org/show_bug.cgi?id=107122
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180712115729.3506-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-07-12 12:57:29 +01:00
parent ee435831ec
commit 41db645a33
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -12738,7 +12738,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
* down.
*/
INIT_WORK(&state->commit_work, intel_atomic_cleanup_work);
schedule_work(&state->commit_work);
queue_work(system_highpri_wq, &state->commit_work);
}
static void intel_atomic_commit_work(struct work_struct *work)