Context package considerably slows down Debian 11 boot time

[remyzandwijk]

After installing one-context_6.0.0-1.deb on a fresh Debian 11 system, booting the system takes a long time (2+ minutes). The console shows:

[ TIME ] Timed out waiting for device /dev/disk/by-uuid/9e8cece2-054c-4525-b024-e1dd548c5c78.
[DEPEND] Dependency failed for /dev/disk/by-uuid/9e8cece2-054c-4525-b024-e1dd548c5c78.
[DEPEND] Dependency failed for Swap.

After the time out, booting the system completes just fine.

The device in question is a disk used for swap:

# grep 'swap' /etc/fstab
# swap was on /dev/vdb1 during installation
UUID=9e8cece2-054c-4525-b024-e1dd548c5c78 none            swap    sw              0       0

# blkid | grep 'swap'
/dev/vdb1: UUID="9e8cece2-054c-4525-b024-e1dd548c5c78" TYPE="swap" PARTUUID="01a354f3-01"

Before I installed the context package, the system booted lighting fast. After purging the context package, to system boots fast too. So I guess something in the context package introduces this time out. It's worth mentioning that if I install the very same context package on a comparable Debian 10 system, it keeps booting just fine and fast.

Any ideas?

[adamatousek]

I am experiencing the same issue, so I will add my few observations.

I thought that the timeout with swap is caused by using a volatile device for swap, which would change its UUID. I unlisted the swap partition from fstab and instructed initrd not to try to resume from it. The boot is still very slow (but with fewer errors) and it seems that it has something to do with udev waiting for devices:

# systemd-analyze blame
2min 468ms ifupdown-pre.service
 2min 15ms systemd-udev-settle.service
    5.188s dev-sdb.device
    2.534s one-context-local.service
    1.246s dev-sda1.device
...

The top two offenders seem to execute udevadm settle at some point (according to systemctl cat)

Interestingly, the journal of systemd-udev-settle.service contains the following line:

udevadm[189]: systemd-udev-settle.service is deprecated. Please fix one-context-local.service not to pull it in.

although I am not sure whether that is a harmless deprecation warning or it indicates something serious.

[vholer]

Please try to replace your udev configuration (/lib/udev/rules.d/65-context.rules) with the one for Debian from master:
https://raw.githubusercontent.com/OpenNebula/addon-context-linux/master/src/lib/udev/rules.d/65-context.rules%23%23deb.one
which triggers the systemd services in a non-blocking way and avoids the deadlocks (also reported here #239).

[vholer]

URL above updated (wrongly encoded # in URLs)

[remyzandwijk]

@vholer , I can confirm that works. Booting the vm is lightning fast!

[adamatousek]

@vholer Thank you, works without further issues.

[vholer]

Closing as fixed in the master, will be release with 6.2.0 soon.