iyzs...@member.fsf.org (宋文武) skribis: > l...@gnu.org (Ludovic Courtès) writes: > >> Hi Chris, >> >> Christopher Baines <m...@cbaines.net> skribis: >> >>> 1.13 0.000019 0 3853 openat >> >> [...] >> >>> 13.56 0.193014 50 3853 openat >> >> So openat(2) is 4 orders of magnitude slower in the VM, which is a >> problem. >> >> I guess a large part of that is due to the fact that VM created with >> ‘guix system vm’ use unionfs as their root file system, which is a FUSE >> thing (see the “volatile” options in (gnu system vm), (gnu system >> linux-initrd), and (gnu build linux-boot).) I’m not sure how we could >> avoid it. > > We might switch to the linux kernel's bultin overlayfs, which should be > faster. > > https://wiki.archlinux.org/index.php/Overlay_filesystem
Good point, we should probably do that. Ludo’.
