kernel-packages team mailing list archive

[Andy Zeigler <andy@xxxxxxxxxxxxxxxxxxx>]

Agesp: In response to your question about whether or not this impacts
other software, I can tell you that it affects our Ruby on Rails app in
production. I'm not sure what is triggering it -- it may be IRB, rails,
or a gem that we have, but there is a constant stream of these messages
on stderr when the rails console ('rails c') is loaded:

deploy@ip-10-0-0-41:/var/www/current$ rails c
Loading production environment (Rails 4.1.10)
20150622025515(production) > df: `/sys/kernel/debug': Function not implemented
df: `/sys/kernel/debug': Function not implemented
df: `/sys/kernel/debug': Function not implemented
df: `/sys/kernel/debug': Function not implemented
...

I get a message every few seconds without any user interaction.

Obviously there is a simple workaround here -- 'rails c 2>/dev/null`.
But it would be nice to have stderr back at some point. :)

Thanks,

Andy

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1465322

Title:
  regression: "df: `/sys/kernel/debug': Function not implemented" with
  3.2.0-85.122

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Precise:
  Fix Committed

Bug description:
  $ cat /proc/version_signature
  Ubuntu 3.2.0-84.121-generic 3.2.68

  $ df | head -3
  Filesystem     1K-blocks    Used Available Use% Mounted on
  /dev/vda1        7481832 4262872   2838904  61% /
  udev              371920       4    371916   1% /dev

  $ cat /proc/version_signature
  Ubuntu 3.2.0-85.122-generic 3.2.69

  $ df | head -3
  df: `/sys/kernel/debug': Function not implemented
  Filesystem     1K-blocks    Used Available Use% Mounted on
  /dev/vda1        7481832 4263012   2838764  61% /
  udev              371920       4    371916   1% /dev

  This is confirmed in an amd64 VM and on an amd64 system. It doesn't
  make a difference if I use sudo.

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