> The following patch will add ingress resolution of uncommon virtio net > hdr checksum metadata (software checksum completion at ingress) which > adds performance overhead to the packet processing. > > We should make it visible, so a hypothetical workload relying on > uncommon metadata can be distinguished from none at all. This way issues > in the parsing will be reported and not quietly pay the host-CPU > checksum overhead instead of offload. > > Flip every call to virtio_net_hdr_to_skb to test for negative errno > only. The um vector raw transport even ignored the return value > altogether: rejected packets went on into the stack with their > metadata unvalidated, so check it there as well. > > Have tun count these events per device as rx_csum_sw, exposed via > ethtool -S. > > Signed-off-by: Michael S. Tsirkin <[email protected]>
Sashiko has reviewed this patch and found no issues. -- Sashiko AI review ยท https://sashiko.dev/#/patchset/[email protected]?part=1
