meson option to customize RTE_PKTMBUF_HEADROOM patch

[Stephen Hemminger]

On Tue, 26 Mar 2024 10:43:30 -0700
Garrett D'Amore <garrett at damore.org> wrote:

> This had occurred to me as well.  I think most hardware DMA engines can align on 32-bit boundaries.  I've yet to see a device that actually requires 64-bit DMA alignment.  (But I have only looked at a subset  of devices, and most of the  ones I have looked at are not ones that would be considered 'modern'.)

There maybe a PCI transaction performance penalty if not aligned.