Patch "drm/amdgpu: bypass lru touch for KIQ ring submission" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

drm/amdgpu: bypass lru touch for KIQ ring submission

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-amdgpu-bypass-lru-touch-for-kiq-ring-submission.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Pixel Ding <[email protected]>
Date: Wed, 8 Nov 2017 10:20:01 +0800
Subject: drm/amdgpu: bypass lru touch for KIQ ring submission

From: Pixel Ding <[email protected]>

[ Upstream commit dce1e131dd4dc68099ff1b70aa03cd2d0acf8639 ]

KIQ ring submission is used for register accessing on SRIOV VF that could happen both in irq enabled and irq disabled cases. Inversion lock could happen on adev->ring_lru_list_lock, while this operation is useless and just adds overhead in this use case.

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -136,7 +136,8 @@ void amdgpu_ring_commit(struct amdgpu_ri
 	if (ring->funcs->end_use)
 		ring->funcs->end_use(ring);
 
-	amdgpu_ring_lru_touch(ring->adev, ring);
+	if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ)
+		amdgpu_ring_lru_touch(ring->adev, ring);
 }
 
 /**

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/drm-amdgpu-bypass-lru-touch-for-kiq-ring-submission.patch