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    SubjectRe: [PATCH RFC] tun: experimental zero copy tx support
    On Wed, May 16, 2012 at 08:16:55AM -0700, Shirley Ma wrote:
    > On Mon, 2012-05-14 at 21:39 +0300, Michael S. Tsirkin wrote:
    > > > Hello Mike,
    > > >
    > > > Have you tested this patch? I think the difference between macvtap
    > > and
    > > > tap is tap forwarding the packet to bridge. The zerocopy is disabled
    > > in
    > > > this case.
    > > >
    > > > Shirley
    > >
    > > Testing in progress, but the patchset I pointed to enables
    > > zerocopy with bridge.
    >
    > Hello Mike,
    >
    > You meant this patch or another patchset for enabling bridge zerocopy?
    >
    > I remembered we disabled forward skb zerocopy since the user space
    > program might hold the buffers too long or forever.
    >
    > In tap/bridge case, when the tx buffers will be released?
    >
    > Thanks
    > Shirley

    It still fails some tests for me but maybe I'll post the whole
    patchset so you can see how it works.


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