Comment 0 for bug 1589289

fstrun daily cronjob output in an unprivileged LXD container:

/etc/cron.weekly/fstrim:
fstrim: cannot open /dev/.lxd-mounts: Permission denied
fstrim: /dev/fuse: not a directory
fstrim: /dev/lxd: FITRIM ioctl failed: Operation not permitted

There is a github issue:

https://github.com/lxc/lxd/issues/2030

The outcome is that it's purely an fstrim misbehaviour, it could be smarter.

Stephane Graber comment:

As all of this is handled by the kernel, there isn't anything we can do about it in LXD.

I think fstrim should be made slightly more clever:

* Don't run on bind-mounts (you can detect bind-mounts by parsing /proc/self/mountinfo instead of /proc/mounts)
* Maybe not be as noisy on expected errors like EACCES, EPERM and ENOENT, only log actual failures which would likely be EINVAL or memory related errors.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: util-linux 2.27.1-6ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Sun Jun 5 19:49:04 2016
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: util-linux
UpgradeStatus: No upgrade log present (probably fresh install)