Il giorno mer 6 mag 2020 alle ore 07:58 Qu Wenruo <quwenruo.btrfs@xxxxxxx> ha scritto: > Thanks for your dump. > > Do you still have the initial looping dmesg? Yeap, you can find the complete syslog here: http://mail.gelma.net/btrfs-vm/syslog.txt > If we're looping on block group 12210667520, then it's possible that Oh, well, from the syslog above: May 3 17:14:25 ubuntu kernel: [ 586.735870] BTRFS info (device sda1): balance: start -musage=2 -susage=2 May 3 17:14:25 ubuntu kernel: [ 586.735974] BTRFS info (device sda1): relocating block group 12479102976 flags system|dup May 3 17:14:25 ubuntu kernel: [ 586.833331] BTRFS info (device sda1): relocating block group 12210667520 flags metadata|dup May 3 17:14:25 ubuntu kernel: [ 586.939172] BTRFS info (device sda1): found 26 extents May 3 17:14:25 ubuntu kernel: [ 587.021568] BTRFS info (device sda1): found 1 extents (and then repeating lines like this) > (Sorry, not sure if I could convert the vbox format to qcow2 nor how > to resume it to KVM/qemu, thus I still have to bother you to dump the > dmesg) I guess no way to migrate the saved state of VB to QEMU. Anyway, I have prepared a minimal Lubuntu 20.04. It starts up, run VirtualBox and let you to replicate what I see. It's ~40GB. If you cat it on /dev/usb-stick you can boot up (no way to run it inside KVM because of VB need to access VT-x). I'm uploading it. It takes lot of hours. I tell you know when done. > If that's the case, it would be very interesting in how we're handling > the data reloc tree. > It would be very worthy digging then. Good! Ciao, Gelma
