Update to my previous comment ... running fstrim on 4.15.0-58-generic result in much more reported trimmed data (206.6 GiB) vs 4.15.0-55-generic (144.4 GiB) (e.g. this was not caused by snapshot release). On 4.15.0-58-generic I see errors like this in kernel log:
BTRFS warning (device dm-0): failed to trim 307 block group(s), last error -512 BTRFS warning (device dm-0): failed to trim 1 device(s), last error -512 Scrub finished with not problems so data on disk are fine (yeah!). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1756315 Title: fstrim and discard operations take too long to complete - Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/1756315/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
