Messages in this thread Patch in this message | | | From | Bernard Zhao <> | Subject | [PATCH V3] amdgpu:optimization-- reduce no need mutex_lock area | Date | Mon, 20 Apr 2020 23:48:18 -0700 |
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Maybe we could reduce the mutex_lock(&mem->lock)`s protected code area, and no need to protect pr_debug.
Signed-off-by: Bernard Zhao <bernard@vivo.com>
Changes since V1: *commit message improve
Changes since V2: *move comment along with the mutex_unlock
Link for V1: *https://lore.kernel.org/patchwork/patch/1226588/ Link for V2: *https://lore.kernel.org/patchwork/patch/1227907/ --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 327317c54f7c..f03d9843d723 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1285,21 +1285,21 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu( struct bo_vm_reservation_context ctx; struct ttm_validate_buffer *bo_list_entry; int ret; + unsigned int mapped_to_gpu_memory; mutex_lock(&mem->lock); + mapped_to_gpu_memory = mem->mapped_to_gpu_memory; + mutex_unlock(&mem->lock); + /* lock is not needed after this, since mem is unused and will + * be freed anyway + */ - if (mem->mapped_to_gpu_memory > 0) { + if (mapped_to_gpu_memory > 0) { pr_debug("BO VA 0x%llx size 0x%lx is still mapped.\n", mem->va, bo_size); - mutex_unlock(&mem->lock); return -EBUSY; } - mutex_unlock(&mem->lock); - /* lock is not needed after this, since mem is unused and will - * be freed anyway - */ - /* No more MMU notifiers */ amdgpu_mn_unregister(mem->bo); -- 2.26.2
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