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    SubjectRe: [PATCH] tcp: splice as many packets as possible at once
    On Tue, Jan 13, 2009 at 04:07:21PM -0800, David Miller ( wrote:
    > > Exactly, and to have it we earlier release a socket so that it could be
    > > acked and while we copy it or doing anything else, the next one would
    > > received.
    > I think the socket release in skb_splice_bits() (although necessary)
    > just muddies the waters, and whether the extra one done in
    > tcp_splice_read() helps at all is open to debate.

    Well, yes, probably simple performance test with and without will
    clarify the things.

    > That skb_clone() done by skb_splice_bits() pisses me off too,
    > we really ought to fix that. And we also have that data corruption
    > bug to cure too.

    Clone is needed since tcp expects to own the skb and frees it
    unconditionally via __kfree_skb().

    What is the best solution for the data corruption bug? To copy the data
    all the time or implement own allocator to be used in alloc_skb and
    friends to allocate the head? I think it can be done transparently for
    the drivers. I can volunteer for this :)
    The first one is more appropriate for the current bugfix-only stage,
    but this will result in the whole release being too slow.

    Evgeniy Polyakov

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      Last update: 2009-01-14 01:17    [W:0.020 / U:13.860 seconds]
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