HEADS UP: zerocopy bpf commits impending
julian at elischer.org
Mon Mar 17 11:29:51 PDT 2008
Robert Watson wrote:
> On Mon, 17 Mar 2008, Christian S.J. Peron wrote:
>> Just wanted to give a heads up that I plan to start merging the work
>> located in the zerocopy bpf perforce branch. We have been working on
>> this project for about a year now and feel that it is ready to come
>> into the tree.
>> I will begin to merge hopefully today [assuming nobody has any
>> concerns] or tommorow. Zerocopy bpf will be disabled by default, and
>> can be enabled globally though the use of a sysctl variable. Once the
>> kernel bits are in and we sort out a couple minor nits in
>> libpcap+tcpdump, we will be be looking at getting our libpcap patches
>> committed upstream. I will post a patch for people to experiment with
>> in the meantime after the kernel commits are complete.
>> We do not anticipate this will have any effect on existing bpf
>> consumers like libpcap, tcpdump etc... so if something breaks, it
>> shouldn't have and we need to know about :) We were pretty careful
>> about preserving the ABI. The only exception to this is, netstat will
>> need a recompile because the size of it's bpf stats structure changed.
>> So if there are any objections or concerns, now is the time to raise
> Per previous posts, interested parties can find the slides on the design
> from the BSDCan 2008 developer summit here:
with the video of the talk at:
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
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