From: Pixel Ding <Pixel.Ding@amd.com>
Date: Wed, 8 Nov 2017 10:20:01 +0800
Subject: drm/amdgpu: bypass lru touch for KIQ ring submission
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Git-commit: dce1e131dd4dc68099ff1b70aa03cd2d0acf8639
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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@amd.com>
Reviewed-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
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);
}
/**