--On 23 January 2013 15:34:42 +0000 "Myklebust, Trond" <Trond.Myklebust@xxxxxxxxxx> wrote:
I've no idea if they do zero copy to the socket in these situations. If they do, then they probably have similar issues. The problem can be mitigated by breaking the connection on retransmission; we can't do that in NFS < NFSv4.1, since the duplicate replay cache is typically indexed to the port number (and port number reuse is difficult with TCP due to the existence of the TIME_WAIT state).
If you break the connection, and the written data is now not available to dom0 (as it's been mapped out), how would it ever get resent? IE it's not going to be available to the RPC layer either. -- Alex Bligh -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
