Re: meson option to customize RTE_PKTMBUF_HEADROOM patch

[Bruce Richardson <bruce.richardson@intel.com>]

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