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

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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 <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2016-03-14 15:40:00 -07:00 committed by David S. Miller
parent e3ebd894f0
commit acffb584cd
1 changed files with 1 additions and 0 deletions
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net/ipv4/inet_diag.c
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@ -879,6 +879,7 @@ void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
} }
spin_unlock_bh(lock); spin_unlock_bh(lock);
cond_resched();
} }
done: done: