[Bug 850935] Re: upstart-udev-bridge at 100% CPU

[Steve Magoun]

I don't see ddebs for libnih, but I did install upstart-dbgsym and nih-
dbus-tool-dbgsym. Here's the resulting stack:

Thread 1 (Thread 0x7f9d72f09720 (LWP 318)):
#0  0x00007f9d72172be2 in _IO_do_write () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f9d72171d95 in _IO_file_xsputn () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f9d7214a5f6 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#3  0x00007f9d721456ee in vfprintf () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x00007f9d721f50db in __fprintf_chk () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x00007f9d726d0e34 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#6  0x00007f9d726c3dd2 in dbus_message_iter_append_basic () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#7  0x00007f9d72f38fb0 in upstart_emit_event (proxy=0x7f9d74dae2f0, name=0x7f9d74db2aa0 "power_supply-device-added", 
    env=<optimized out>, wait=0, handler=0, error_handler=0x7f9d72f35d7c <emit_event_error>, data=0x0, timeout=2147483647)
    at com.ubuntu.Upstart.c:1018
#8  0x00007f9d72f36195 in udev_monitor_watcher (udev_monitor=<optimized out>, watch=<optimized out>, 
    events=<optimized out>) at upstart-udev-bridge.c:276
#9  0x00007f9d72b0143b in nih_io_handle_fds () from /lib/libnih.so.1
#10 0x00007f9d72b05365 in nih_main_loop () from /lib/libnih.so.1
#11 0x00007f9d7211f30d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#12 0x00007f9d72f35cb1 in _start ()

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https://bugs.launchpad.net/bugs/850935

Title:
  upstart-udev-bridge at 100% CPU

Status in “upstart” package in Ubuntu:
  New

Bug description:
  I noticed that upstart-udev-bridge was using 100% of one of my CPU
  cores. I noticed this after a compiz crash; I'm not sure if the
  problem was happening before the crash.

  Attached is an strace log:
  sudo strace -f -o upstart-udev-bridge.strace -v -p 291

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: upstart 1.3-0ubuntu8
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
  Date: Thu Sep 15 09:30:34 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: upstart
  UpgradeStatus: Upgraded to oneiric on 2011-09-02 (12 days ago)

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