net: diag: add a scheduling point in inet_diag_dump_icsk()

On loaded TCP servers, looking at millions of sockets can hold cpu for many seconds, if the lookup condition is very narrow. (eg : ss dst 1.2.3.4 ) Better add a cond_resched() to allow other processes to access the cpu. Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
zuai · Mar 14, 2016 · acffb58 · acffb58
1 parent e3ebd89
commit acffb58
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
@@ -879,6 +879,7 @@ void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
 		}
 
 		spin_unlock_bh(lock);
+		cond_resched();
 	}
 
 done: