On Mon, Jul 11, 2022 at 06:11:13PM -0300, Leonardo Bras wrote: > Some errors, like the lack of Scatter-Gather support by the network > interface(NETIF_F_SG) may cause sendmsg(...,MSG_ZEROCOPY) to fail on using > zero-copy, which causes it to fall back to the default copying mechanism. > > After each full dirty-bitmap scan there should be a zero-copy flush > happening, which checks for errors each of the previous calls to > sendmsg(...,MSG_ZEROCOPY). If all of them failed to use zero-copy, then > increment dirty_sync_missed_zero_copy migration stat to let the user know > about it. > > Signed-off-by: Leonardo Bras <leob...@redhat.com> > Reviewed-by: Daniel P. Berrangé <berra...@redhat.com>
Acked-by: Peter Xu <pet...@redhat.com> -- Peter Xu
