Am 20.07.23 um 01:24 schrieb Jason Gunthorpe:
On Wed, Jul 19, 2023 at 10:57:11AM -0700, Stephen Hemminger wrote:
Naive idea.
Would it be possible for process to use mmap() on the GPU memory and then
do zero copy TCP receive some how? Or is this what is being proposed.
It could be possible, but currently there is no API to recover the
underlying dmabuf from the VMA backing the mmap.
Sorry for being a bit late, have been on vacation.
Well actually this was discussed before to work around problems with
Windows applications through wine/proton.
Not 100% sure what the outcome of that was, but if I'm not completely
mistaken getting the fd behind a VMA should be possible.
It might just not be the DMA-buf fd, because we use mmap() re-routing to
be able to work around problems with the reverse tracking of mappings.
Christian.
Also you can't just take arbitary struct pages from any old VMA and
make them "netmem"
Jason
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