diff --git a/fs/proc/base.c b/fs/proc/base.c
index 1516ff281c70734cb0d9443d0ac91ba75120389e..502f30fd75ac6aef1616f334b56ca86b3c882f69 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3966,6 +3966,20 @@ static ssize_t pid_tag_write(struct file *file, const char __user *buf,
 
 	sched_settag(tsk, tag);
 
+#ifdef CONFIG_QOS_SCHED_SMART_GRID
+	if (smart_grid_enabled()) {
+		tag = tag < SCHED_GRID_QOS_TASK_LEVEL_HIGHEST ?
+			SCHED_GRID_QOS_TASK_LEVEL_HIGHEST : tag;
+		tag = tag >= SCHED_GRID_QOS_TASK_LEVEL_MAX ?
+			SCHED_GRID_QOS_TASK_LEVEL_DEFAULT : tag;
+
+		if (tsk->grid_qos != NULL &&
+		    tsk->grid_qos->stat.set_class_lvl != NULL)
+			err = tsk->grid_qos->stat.set_class_lvl(&tsk->grid_qos->stat,
+								(unsigned int)tag);
+	}
+#endif
+
 out:
 	put_task_struct(tsk);
 	return err < 0 ? err : count;