tcp/dccp: add a reschedule point in inet_csk_listen_stop()

Eric Dumazet · davem330 · commit 92d6f176fdcc · 2015-10-03T04:32:45.000-07:00
If a listener with thousands of children in accept queue
is dismantled, it can take a while to close all of them.

Signed-off-by: Eric Dumazet &lt;edumazet@google.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
@@ -809,6 +809,7 @@ void inet_csk_listen_stop(struct sock *sk)
 		sock_put(child);
 
 		reqsk_put(req);
+		cond_resched();
 	}
 	if (queue->fastopenq.rskq_rst_head) {
 		/* Free all the reqs queued in rskq_rst_head. */

Original file line number	Diff line number	Diff line change
`@@ -809,6 +809,7 @@ void inet_csk_listen_stop(struct sock *sk)`
`809`	`809`	`sock_put(child);`
`810`	`810`
`811`	`811`	`reqsk_put(req);`
	`812`	`+ cond_resched();`
`812`	`813`	`}`
`813`	`814`	`if (queue->fastopenq.rskq_rst_head) {`
`814`	`815`	`/* Free all the reqs queued in rskq_rst_head. */`