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 <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Dec 18 13:28:59 CET 2017
From: Pixel Ding <Pixel.Ding@xxxxxxx>
Date: Wed, 8 Nov 2017 10:20:01 +0800
Subject: drm/amdgpu: bypass lru touch for KIQ ring submission
From: Pixel Ding <Pixel.Ding@xxxxxxx>
[ 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.
Signed-off-by: Pixel Ding <Pixel.Ding@xxxxxxx>
Reviewed-by: Monk Liu <Monk.Liu@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -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 Pixel.Ding@xxxxxxx are
queue-4.14/drm-amdgpu-bypass-lru-touch-for-kiq-ring-submission.patch