The command:

btrfs subvolume delete /old/opt

Has been running over night. Currently 980 minutes and counting, and it is pegging 1 CPU core at 100%. I also initiated a second delete, and it too is using 100% of 1 CPU core for the last 917 minutes.

The drive is 1 64gb SSD. OpenSuse Tumbleweeed version dated 9-20-2018 kernel 4.18.8

8gb of RAM

I have over a dozen more to delete.

Can I execute commands before this to make it go faster?

Since the standard command locks a whole CPU core at 100% how do I delete them?

How do I diagnose the problem?

  • 1
    Which version of btrfs-progs are you using? – rickhg12hs Sep 24 '18 at 7:57
  • @rickhg12hs I have added my version numbers. – cybernard Sep 24 '18 at 11:39

Apparently its to dumb to know that the file system is still mounted.

Instead of failing, and saying it can't do it because the volume is mounted it just hangs.

Worst, apparently, it does delete the contents of subvolume so when you reboot it goes into emergency mode.

You have to edit /etc/fstab to delete the subvolume(s) and then reboot.

Now you can delete the subvolumes normally.

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