ipv6: Limit mtu to 65575 bytes
Francois reported that setting big mtu on loopback device could prevent tcp sessions making progress. We do not support (yet ?) IPv6 Jumbograms and cook corrupted packets. We must limit the IPv6 MTU to (65535 + 40) bytes in theory. Tested: ifconfig lo mtu 70000 netperf -H ::1 Before patch : Throughput : 0.05 Mbits After patch : Throughput : 35484 Mbits Reported-by: NFrancois WELLENREITER <f.wellenreiter@gmail.com> Signed-off-by: NEric Dumazet <edumazet@google.com> Acked-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by: NHannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Showing
想要评论请 注册 或 登录