[PATCH] block: only fail dma-buf bios that need block layer PI

[Christoph Hellwig]

On Thu, Oct 29, 2026 at 11:51:31AM +0000, Pavel Begunkov wrote:
> Thanks, looks good from a quick glance, I'll take another look in
> a bit. It might be nice to somehow support kernel generated PI
> as well later, looks like there will be a good bunch of cases that
> might want to have CPU access.

I don't think the kernel auto-PI makes sense for P2P.  The data lives
on a remote device, so generating PI for it would have to transfer
the data to the host.  Instead we probably should just force PRACT
for that case.  It would make sense to support PI generation for
dmabufs using local memory, though.