[Bug 922754] Re: booting without --no-log causes init and plymouth-upstart-bridge to spin at 100%

[Steve Langasek]

On Fri, Feb 03, 2012 at 05:24:55PM -0000, Stefan Bader wrote:
> Test booted with 1.4-0ubuntu5~jh installed and the --no-log not present.
> Issue seems to be fixed. No processes in tight loop (init, upstart-udev-
> bridge) observed. Boot finished correctly and brought up serial console.

Stefan, I believe this package still has logging support disabled by default
still.  Could you please boot with the '--log' boot option, and confirm that
things are still ok for you?

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org

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https://bugs.launchpad.net/bugs/922754

Title:
  booting without --no-log causes init and plymouth-upstart-bridge to
  spin at 100%

Status in Upstart:
  Fix Committed
Status in “upstart” package in Ubuntu:
  In Progress

Bug description:
  Release: Precise
  Architecture: amd64

  Likely broken since upstart_1.4-0ubuntu3

  When booting after recent updates I see init and plymouth-upstart-
  bridge spinning at 100% CPU time, defunct processes do not get reaped
  and a console on ttyS1 which is supposed to start, does not come up.

  Looking at strace of plymouth-upstart-bridge it seems to run a tight loop of 
  epoll_wait(3, {}, 64, 0)                = 0 (/proc/1383/fd/3 -> anon_inode:[eventpoll])

  and init does another tight loop of
  read(24, 0x7ffdc2d1caa0, 8192)          = -1 EAGAIN (Resource temporarily unavailable)
    (/proc/1/fd/24 -> /dev/ptmx)

  Booting with --no-log on the grub commandline brings the system up
  without showing any problems.

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