(no subject)

Zhang, Qiang
2020-09-09T06:35:26Z

When config preempt RCU, if task switch happened in rcu read critical region.
the current task be add to "rnp->blkd_tasks" link list, these rnp is leaf node in RCU tree.
In "rcu_gp_fqs_loop" func,

static void rcu_gp_fqs_loop(void)
{

struct rcu_node *rnp = rcu_get_root();
}