[Bug 1877418] Re: qemu-nbd freezes access to VDI file

[Bump]

I thought there were qemu-img for that. Since qemu-nbd allows mounting
images a rw block devices, it's logical to think that you can use it for
that purpose. Will try to reproduce again the issue in case it was a
kernel problem instead of qemu-nbd.

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https://bugs.launchpad.net/bugs/1877418

Title:
  qemu-nbd freezes access to VDI file

Status in QEMU:
  New
Status in btrfs-progs package in Ubuntu:
  New

Bug description:
  Mounted Oracle Virtualbox .vdi drive (dynamically allocated), which has GTP+BTRFS:
  sudo modprobe nbd max_part=16
  sudo qemu-nbd -c /dev/nbd0 /storage/btrfs.vdi
  mount /dev/nbd0p1 /mydata/

  Then I am operating on the btrfs filesystem and suddenly it freezes.

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