Hello Jason, Willem's patch works, right on the mark. Confirmed the guest performance is back to normal.
Thanks, and sorry for the noise! On Mon, Aug 5, 2024 at 1:17 AM Jason Wang <jasow...@redhat.com> wrote: > > On Mon, Aug 5, 2024 at 2:10 PM Blake Sperling <breakingsp...@gmail.com> wrote: > > > > Hello, I noticed a regression from v.6.6.43 to v6.6.44 caused by this > > commit. > > > > When using virtio NIC with a QEMU/KVM Windows guest, network traffic from > > the VM stalls in the outbound (upload) direction.This affects remote access > > and file shares most noticeably, and the inbound (download) direction does > > not have the issue. > > > > iperf3 will show consistent results, 0 bytes/sec when initiating a test > > within the guest to a server on LAN, and reverse will be full speed. > > Nothing out of the ordinary in host dmesg or guest Event Viewer while the > > behavior is being displayed. > > > > Crucially, this only seems to affect Windows guests, Ubuntu guest with the > > same NIC configuration tests fine both directions. > > I wonder if NetKVM guest drivers may be related, the current latest version > > of the drivers (v248) did not make a difference, but it is several months > > old. > > > > Let me know if there are any further tests or info I can provide, thanks! > > Does Willem's patch fix the issue? > > https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=89add40066f9ed9abe5f7f886fe5789ff7e0c50e > > Thanks > -- -Blake Sperling
