On Nov 4, 2015, at 9:04 PM, David Miller <da...@davemloft.net> wrote:

> As part of fixing y2038 problems, Arnd is going to have to make a new
> version fo the AF_PACKET mmap() tpacker descriptors in order to extend
> the time values to 64-bit.
> 
> So I want everyone to think about whether there are any other changes
> we might want to make given that we have to make a v4 anyways.
> 
> Particularly, I am rather certain that the buffer management could be
> improved.  Some have complained that v3 is kinda awkward to use and/or
> suboptimal is various ways.

As a core libpcap developer, I will at least state that it works a *lot* better 
than v1 and v2 did.  Having buffer slots that can hold only one packet is 
*really* suboptimal for packet capture; having buffer slots that can hold 
multiple packets works a lot better, as there's less wasted memory.

I'll see whether there are any changes that *would* make libpcap's life 
better.--
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