drm/ttm: Workaround memory allocation limits affecting KFD

Allow up to 15/16 of system memory to be used.


Fix BUG: SWDEV-106528

Change-Id: I5d47bfa49459c62da49bbae6058c940b2d37b3f6
Signed-off-by: Yong Zhao <yong.zhao@amd.com>

drivers/gpu/drm/ttm/ttm_memory.c

@@ -311,9 +311,9 @@ static int ttm_mem_init_kernel_zone(struct ttm_mem_global *glob,
 
 	zone->name = "kernel";
 	zone->zone_mem = mem;
-	zone->max_mem = mem >> 1;
-	zone->emer_mem = (mem >> 1) + (mem >> 2);
-	zone->swap_limit = zone->max_mem - (mem >> 3);
+	zone->max_mem = mem - (mem >> 4); /* 15/16 */
+	zone->emer_mem = mem - (mem >> 4); /* 15/16 */
+	zone->swap_limit = zone->max_mem;
 	zone->used_mem = 0;
 	zone->glob = glob;
 	glob->zone_kernel = zone;