drm/amdgpu: move VM page tables to the LRU end on CS v2

This makes it less likely to run into an ENOMEM because
VM page tables are evicted last.

v2: move the BOs in the LRU tail after validation

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index ce0254d4dcd7..1fffc338f69d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -428,8 +428,10 @@ static int amdgpu_cs_parser_relocs(struct amdgpu_cs_parser *p)
         r = amdgpu_cs_list_validate(p->adev, &fpriv->vm, &duplicates);
 
 error_validate:
-        if (r)
+        if (r) {
+                amdgpu_vm_move_pt_bos_in_lru(p->adev, &fpriv->vm);
                 ttm_eu_backoff_reservation(&p->ticket, &p->validated);
+        }
 
 error_reserve:
         if (need_mmap_lock)
@@ -473,8 +475,11 @@ static int cmp_size_smaller_first(void *priv, struct list_head *a,
  **/
 static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error, bool backoff)
 {
+        struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
         unsigned i;
 
+        amdgpu_vm_move_pt_bos_in_lru(parser->adev, &fpriv->vm);
+
         if (!error) {
                 /* Sort the buffer list from the smallest to largest buffer,
                  * which affects the order of buffers in the LRU list.