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drm/amdgpu: bypass lru touch for KIQ ring submission 

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>
This commit is contained in:
Pixel Ding 2017-11-08 10:20:01 +08:00 committed by Alex Deucher
parent 78aa02c713
commit dce1e131dd
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
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@ -136,7 +136,8 @@ void amdgpu_ring_commit(struct amdgpu_ring *ring)
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);
}
/**