Nom Nom Nom

Regretfully not burger related - but related to an error (I think) in the upgrade of  Ubuntu 14.10 Utopic from 15.04.

In trying to figure out what it was that was causing iowait of 50% on an otherwise idle box, I was checking over processes with a fine toothed comb.

I discovered that for some reason the grub menu had launched with the same (unfamiliar) modules a lot of times.

This was teh reason why it sat in the process list thus....

/sbin/init nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw

Removing this previously unnoticed command from the boot sequence ended in badness.

Adding it back just the once resulted in the following....

/sbin/init nomdmonddf nomdmonisw

My understanding it is related to dmraid and mdadm. As this is a software RAID1 installation that would add up - but three times - really?

2 Responses to “Nom Nom Nom

  • In case it helps, the repetition of “nom nom nom” seems to be caused by /etc/default/grub.d/dmraid2mdadm.cfg appending the entries to the kernel command line without checking and dpkg-reconfigure grub-pc picking those up and writing them into /etc/default/grub — so each reconfigure of grub-pc will add one more iteration :-(

    See my blog post (http://ewen.mcneill.gen.nz/blog/entry/2015-06-14-ubuntu-lucid-to-trust-in-two-larger-steps/) for some more details/links.

    Ewen

    • anthony
      9 years ago

      Ewen – many thanks – much appreciated… I was getting that ‘it’s just me feeling‘. Indeed this is an MD configuration – and this appears to be the issue.

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