Fair enough... I think that is just something we're going to have to live with.
The other solutions are either much more painful, or much more work. If we can use header/buffer splitting that would be superior. Right now we can't use that everywhere because it isn't available everywhere. On Mar 26, 2024 at 1:35 PM -0700, Stephen Hemminger <step...@networkplumber.org>, wrote: > On Tue, 26 Mar 2024 10:43:30 -0700 > Garrett D'Amore <garr...@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.
