On Tue, Jun 21, 2022 at 04:51:39PM +0200, Juan Quintela wrote: > > IIRC, the kernel will fall back to copying only if the network adapter / > > driver > > does not support MSG_ZEROCOPY, like when it does not support scatter-gather. > > My understanding is that it will fallback when you have too much stuff > inflight.
I think we'd better figure this out soon, because if so then IMHO we can't simply fail the migration when the fallback happens.. If we're not sure about that, we can always be on the safe side to dump an error only. -- Peter Xu
