Hi, On Wed, Sep 18, 2024 at 12:01:01PM +0000, Kocher Emanuel, Bedag wrote: > Hi Salvatore > > On 18/09/2024 10:21, Salvatore Bonaccorso wrote: > > Resending to the correct bug (#1082081) > > > > On Wed, Sep 18, 2024 at 10:19:28AM +0200, Salvatore Bonaccorso wrote: > >> Hi David, hi Emanuel, > >> > >> On Wed, Sep 18, 2024 at 08:29:54AM +0200, David Prévot wrote: > >>> Control: clone -1 -2 > >>> Control: reopen -2 > >>> Control: found -2 linux/6.1.106-3 > >>> Control: retitle -2 Performance issues on VM (virtio) > >>> > >>> Hi, > >>> > >>> Le Mon, Sep 16, 2024 at 11:37:07AM +0000, Kocher Emanuel, Bedag a écrit : > >>> […] > >>>> We still see issues with linux/6.1.106-3 in combination with virtio. > >>> Thanks for the feedback. > >>> > >>>> Network performance is down to ~4 Mb/s measured with iperf3 instead of > >>>> ~8 Gb/s (with linux/6.1.99-1 respectively 6.1.0-23-amd64). It is > >>>> reproducible and booting the previous kernel resolves the issue. > >>> Our network team also noticed performance issues, roughly 20 to 30% > >>> increase speed on packages download once we reverted to 6.1.0-23-amd64 > >>> on a mirror we host. Not sure it’s exactly the same issue as the one > >>> initially reported, hence the clone, but I agree there is still an issue > >>> with the current stable kernel. > >> Thanks for reporting back. I will try to reproduce it so we can test > >> against newer 6.1.y kernels as well. Do you have reproducers available > >> to show it? > > Yes, we are able to reproduce it on Nutanix hypervisors (virtio > modules). There are different effects, e.g. copying a 1G file from an > NFS-Share to such a server results in input/output errors (after approx > 50s) and the NFS share going stale for a while, whereas on a healthy > server the process takes approx. 6s. > > We see a lot of kernel messages like the one below (size varying between > 1368, 1380, 1398 and 1448): > > eth0: bad gso: type: 1, size: 1448 > > Tell me if you want me to test something.
Ah Nutanix, well that's not easily available to get ;-). Anyway, I noticed there is the following commit queued for the next stable series: https://lore.kernel.org/all/20240910213553.839926-1-willemdebruijn.ker...@gmail.com/ I'm not yet sure and have to find a way to reproduce your both issues, but in case you might check if applying the patch fixes your issue? Regards, Salvatore
