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Date: Thu, 05 Apr 2007 10:17:40 +0300 From: Avi Kivity <avi@...ranet.com> To: Rusty Russell <rusty@...tcorp.com.au> Cc: Ingo Molnar <mingo@...e.hu>, kvm-devel@...ts.sourceforge.net, netdev <netdev@...r.kernel.org> Subject: Re: [kvm-devel] QEMU PIC indirection patch for in-kernel APIC work Rusty Russell wrote: > You didn't quote Anthony's point about "it's more about there not being > good enough userspace interfaces to do network IO." > > It's easier to write a kernel-space network driver, but it's not > obviously the right thing to do until we can show that an efficient > packet-level userspace interface isn't possible. I don't think that's > been done, and it would be interesting to try. > In the case of networking, the copyful interfaces on receive are driven by the hardware not knowing how to split the header from the data. On transmit I agree, it could be made copyless from userspace (somthing like sendfilev, only not file oriented). -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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