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    SubjectRe: [PATCH] zerocopy NFS for 2.5.36
    Hello, Neil

    > > I ported the zerocopy NFS patches against linux-2.5.36.
    > hi,
    > I finally got around to looking at this.
    > It looks good.


    > However it really needs the MSG_MORE support for udp_sendmsg to be
    > accepted before there is any point merging the rpc/nfsd bits.
    > Would you like to see if davem is happy with that bit first and get
    > it in? Then I will be happy to forward the nfsd specific bit.


    > I'm bit I'm not very sure about is the 'shadowsock' patch for having
    > several xmit sockets, one per CPU. What sort of speedup do you get
    > from this? How important is it really?

    It's not so important.

    davem> Personally, it seems rather essential for scalability on SMP.

    It will be effective on large scale SMP machines as all kNFSd shares
    one NFS port. A udp socket can't send data on each CPU at the same
    time while MSG_MORE/UDP_CORK options are set.
    The UDP socket have to block any other requests during making a UDP frame.

    Thank you,
    Hirokazu Takahashi.
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