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* [PATCH] drm/xe/ufence: Flush xe ordered_wq in case of ufence timeout
@ 2024-10-23 15:58 Nirmoy Das
  2024-10-23 22:39 ` Matthew Brost
                   ` (9 more replies)
  0 siblings, 10 replies; 14+ messages in thread
From: Nirmoy Das @ 2024-10-23 15:58 UTC (permalink / raw)
  To: intel-xe
  Cc: Nirmoy Das, Badal Nilawar, Matthew Auld, John Harrison,
	Himal Prasad Ghimiray, Lucas De Marchi, Matthew Brost

Flush xe ordered_wq in case of ufence timeout which is observed
on LNL and that points recent scheduling issue with E-cores.

This is similar to the recent fix:
commit e51527233804 ("drm/xe/guc/ct: Flush g2h worker in case of g2h
response timeout") and should be removed once there is E core
scheduling fix.

Cc: Badal Nilawar <badal.nilawar@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2754
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
---
 drivers/gpu/drm/xe/xe_wait_user_fence.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_wait_user_fence.c b/drivers/gpu/drm/xe/xe_wait_user_fence.c
index f5deb81eba01..7f034871345b 100644
--- a/drivers/gpu/drm/xe/xe_wait_user_fence.c
+++ b/drivers/gpu/drm/xe/xe_wait_user_fence.c
@@ -155,6 +155,17 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data,
 		}
 
 		if (!timeout) {
+			/*
+			 * This is analogous to e51527233804 ("drm/xe/guc/ct: Flush g2h worker
+			 * in case of g2h response timeout")
+			 *
+			 * TODO: Drop this change once workqueue scheduling delay issue is
+			 * fixed on LNL Hybrid CPU.
+			 */
+			__flush_workqueue(xe->ordered_wq);
+			err = do_compare(addr, args->value, args->mask, args->op);
+			if (err <= 0)
+				break;
 			err = -ETIME;
 			break;
 		}
-- 
2.46.0


^ permalink raw reply related	[flat|nested] 14+ messages in thread

end of thread, other threads:[~2024-10-24 20:51 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-10-23 15:58 [PATCH] drm/xe/ufence: Flush xe ordered_wq in case of ufence timeout Nirmoy Das
2024-10-23 22:39 ` Matthew Brost
2024-10-24  9:08   ` Nirmoy Das
2024-10-24  2:05 ` Ghimiray, Himal Prasad
2024-10-24  9:18   ` Nirmoy Das
2024-10-24  9:08 ` ✓ CI.Patch_applied: success for " Patchwork
2024-10-24  9:09 ` ✓ CI.checkpatch: " Patchwork
2024-10-24  9:10 ` ✓ CI.KUnit: " Patchwork
2024-10-24  9:21 ` ✓ CI.Build: " Patchwork
2024-10-24  9:24 ` ✓ CI.Hooks: " Patchwork
2024-10-24  9:25 ` ✓ CI.checksparse: " Patchwork
2024-10-24  9:42 ` [PATCH] " Jani Nikula
2024-10-24  9:46   ` Nirmoy Das
2024-10-24 20:51 ` ✓ CI.FULL: success for " Patchwork

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