Commit f72fc9bd authored by Eric Huang's avatar Eric Huang Committed by Alex Deucher
Browse files

drm/amdkfd: optimize svm range evict 



It is to avoid unnecessary queue eviction when range
is not mapped to gpu.

Signed-off-by: default avatarEric Huang <jinhuieric.huang@amd.com>
Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1f374171

drivers/gpu/drm/amd/amdkfd/kfd_svm.c

+9 −1
Original line number Diff line number Diff line
@@ -1778,8 +1778,12 @@ svm_range_evict(struct svm_range *prange, struct mm_struct *mm, 
	if (!p->xnack_enabled ||

	    (prange->flags & KFD_IOCTL_SVM_FLAG_GPU_ALWAYS_MAPPED)) {

		int evicted_ranges;

		bool mapped = prange->mapped_to_gpu;



		list_for_each_entry(pchild, &prange->child_list, child_list) {

			if (!pchild->mapped_to_gpu)

				continue;

			mapped = true;

			mutex_lock_nested(&pchild->lock, 1);

			if (pchild->start <= last && pchild->last >= start) {

				pr_debug("increment pchild invalid [0x%lx 0x%lx]\n",
@@ -1789,6 +1793,9 @@ svm_range_evict(struct svm_range *prange, struct mm_struct *mm, 
			mutex_unlock(&pchild->lock);

		}



		if (!mapped)

			return r;



		if (prange->start <= last && prange->last >= start)

			atomic_inc(&prange->invalid);
@@ -3345,7 +3352,8 @@ svm_range_set_attr(struct kfd_process *p, struct mm_struct *mm, 
			goto out_unlock_range;



		if (migrated && (!p->xnack_enabled ||

		    (prange->flags & KFD_IOCTL_SVM_FLAG_GPU_ALWAYS_MAPPED))) {

		    (prange->flags & KFD_IOCTL_SVM_FLAG_GPU_ALWAYS_MAPPED)) &&

		    prange->mapped_to_gpu) {

			pr_debug("restore_work will update mappings of GPUs\n");

			mutex_unlock(&prange->migrate_mutex);

			continue;