Hi Leo, Leo Famulari writes: > While using `guix system vm`, I noticed this warning. I think it's new, > maybe from the 5.2.0 update? > > ------ > qemu-system-x86_64: warning: 9p: degraded performance: a reasonable > high msize should be chosen on client/guest side (chosen msize is <= > 8192). See https://wiki.qemu.org/Documentation/9psetup#msize for > details. > ------ > > That web page suggests that we increase the virtio packet size when > declaring the 9p file-systems, I think in %linux-vm-file-systems of (gnu > system vm). The attached patch should fix it (it does for me at least!).