It is to avoid unnecessary queue eviction when range
is not mapped to gpu.
Signed-off-by: Eric Huang <jinhuieric.huang@xxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 586bef4fcc8a..1f1f8f2dfa28 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -1775,8 +1775,12 @@ 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",
@@ -1786,6 +1790,9 @@ 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);
--
2.25.1
