I've recently switched to btrfs for better compatibility with Windows 10 (for which a third-party driver is available). The btrfs partition (on a SATA SSD) was mounted only for /home, and is formatted and mounted as a system partition when my operating system was installed (Pop OS 20.04).

After that I frequently encounter my chromium browser freezing up for a few seconds, sometimes it even leads to OS perceiving it as unresponsive process and prompt to kill it.

I wonder if it is caused by the btrfs not being mounted using the optimal option (with -o ssd and --autodefrag enabled). But I don't want to take the risk to mount it again and lose access to my home directory.

Is there a way to list all the status quo mounting option using the btrfs commandline tool?

  • 1
    Idk, but mount or cat /etc/mtab will.
    – waltinator
    Jul 24, 2021 at 3:50
  • thanks a lot! mount indeed is the right command: mount | grep home /dev/sda1 on /home type btrfs (rw,relatime,ssd,space_cache,subvolid=5,subvol=/)
    – tribbloid
    Jul 24, 2021 at 17:50

1 Answer 1


The modern and arguably much nicer way is findmnt:

$ findmnt /
# /      /dev/mapper/cryptroot btrfs  rw,relatime,compress-force=zstd:3,ssd,space_cache,autodefrag,subvolid=5,subvol=/
  • Indeed, much better
    – tribbloid
    Sep 13, 2021 at 18:22

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