Re: mmap/munmap bug

From: Hayim Shaul (hayim_at_post.tau.ac.il)
Date: 03/22/05

  • Next message: Ingo Molnar: "Re: Latency tests with 2.6.12-rc1" 
    Date:	Tue, 22 Mar 2005 10:23:48 +0200 (IST)
To: Arjan van de Ven <arjan@infradead.org>

    >> Does it support zero copy not only for send but also for receive? Can we
    >> receive packets directly to userspace buffers?
    >
    > that it can't currently, but without some major protocol stack rework
    > that's not going to be easy. If you want to help do that work,
    > excellent! Be sure to contact the people on net-dev mailinglist since
    > they are the ones having looked at this previously.

    My case is simpler, as the application I attend it to is similar to a NAT.
    A packet comes in, a little alternation of the headers and off it goes
    again. So there's no TCP-stack or anything.

    What I thought of doing, is map the skbuff to user-space. Have the
    user-application alter the headers. Send the (same) skbuff from
    kernel-space.

    Does there exist anything equivalent?

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  • Next message: Ingo Molnar: "Re: Latency tests with 2.6.12-rc1"

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