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Commit 59445b6b authored by Gao feng's avatar Gao feng Committed by David S. Miller
Browse files

ipv4: avoid useless call of the function check_peer_pmtu 



In func ipv4_dst_check,check_peer_pmtu should be called only when peer is updated.
So,if the peer is not updated in ip_rt_frag_needed,we can not inc __rt_peer_genid.

Signed-off-by: default avatarGao feng <gaofeng@cn.fujitsu.com>
Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1805b2f0

net/ipv4/route.c

+1 −2
Original line number Original line Diff line number Diff line
@@ -1593,11 +1593,10 @@ unsigned short ip_rt_frag_needed(struct net *net, const struct iphdr *iph, 
			est_mtu = mtu;

			est_mtu = mtu;

			peer->pmtu_learned = mtu;

			peer->pmtu_learned = mtu;

			peer->pmtu_expires = pmtu_expires;

			peer->pmtu_expires = pmtu_expires;

			atomic_inc(&__rt_peer_genid);

		}

		}





		inet_putpeer(peer);

		inet_putpeer(peer);



		atomic_inc(&__rt_peer_genid);

	}

	}

	return est_mtu ? : new_mtu;

	return est_mtu ? : new_mtu;

}

}