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
