Anthony Liguori <aligu...@us.ibm.com> writes: > Yes, take a look at the series I sent out that scrubs all of this to > just send the index and the addresses of the element. > > We technically should save the addresses and sizes too. It makes it a > heck of a lot safer then re-reading guest memory since we do some > validation on the size of the sg elements.
Not really. The guest puts the descriptors in the ring and leaves them there until the device acks. If it changes them once they're exposed but before they're acked, it can get either before or after version, and always could. Cheers, Rusty.