On Mon, 25 Mar 2024 10:01:52 +0000 Bruce Richardson <bruce.richard...@intel.com> wrote:
> On Sat, Mar 23, 2024 at 01:51:25PM -0700, Garrett D'Amore wrote: > > So we right now (at WEKA) have a somewhat older version of DPDK that we > > have customized heavily, and I am going to to need to to make the > > headroom *dynamic* (passed in at run time, and per port.) > > We have this requirement because we need payload to be at a specific > > offset, but have to deal with different header lengths for IPv4 and now > > IPv6. > > My reason for pointing this out, is that I would dearly like if we > > could collaborate on this -- this change is going to touch pretty much > > every PMD (we don't need it on all of them as we only support a subset > > of PMDs, but its still a significant set.) > > I'm not sure if anyone else has considered such a need -- this > > particular message caught my eye as I'm looking specifically in this > > area right now. > > > Hi > > thanks for reaching out. Can you clarify a little more as to the need for > this requirement? Can you not just set the headroom value to the max needed > value for any port and use that? Is there an issue with having blank space > at the start of a buffer? > > Thanks, > /Bruce If you have to make such a deep change across all PMD's then maybe it is not the best solution. What about being able to do some form of buffer chaining or pullup.
