on openvz fails with ioprio_set: Operation not permitted

[Markus Heberling]

Binary package hint: update-motd

I have installed ubuntu on a openv container and it seem that on that particular configuration changing of ionice is not allowed. This leads to failure of the update-motd script.

Uncommenting the line "ionice -c2 -n7 -p $$ >/dev/null" in the update-motd script fixes the issue for me, but maybe there is a better way.

[Dustin Kirkland  (kirkland)]

Hi Markus, thanks for the report.

One thing I'm unclear about...

The line "ionice -c2 -n7 -p $$ >/dev/null" is not commented in the source code.

How did yours become commented? Could you remove update-motd, and then add it back, and see if you can reproduce the problem?

:-Dustin

[Markus Heberling (markus-tisoft)]

Sorry... I meant "commenting out the line solved the problem"

[Dustin Kirkland  (kirkland)]

Okay, thanks for the clarification.

Can you try it with some different values of -n?

You can use 0-7, with 0 being the highest priority (not what we want),
and 7 being the lowest priority (what I was going for).

I really don't want to comment this out entirely, but would like to
find values that work for you.

:-Dustin

[Dustin Kirkland  (kirkland)]

Also, could you try removing the -n argument entirely?

:-Dustin

[Dustin Kirkland  (kirkland)]

Okay, I'll just change that one line to succeed unconditionally. It'll be a best effort io-renice :-)

Thanks for the bug report, cheers!
:-Dustin

[Launchpad Janitor (janitor)]

This bug was fixed in the package update-motd - 1.11

---------------
update-motd (1.11) jaunty; urgency=low

  * update-motd: don't fail the entire script, if renice/ionice fail,
    LP: #331921; ionice to 'idle' rather than 'best-effort'

 -- Dustin Kirkland <email address hidden> Thu, 05 Mar 2009 10:51:26 -0600