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[Bug Watch Updater <379780@xxxxxxxxxxxxxxxxxx>]

** Changed in: udisks
       Status: Fix Released => Confirmed

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https://bugs.launchpad.net/bugs/379780

Title:
  CD-ROM polling on some Optiarc drives causes high CPU usage

Status in The Linux Kernel:
  Confirmed
Status in abstraction for enumerating and managing block devices:
  Confirmed
Status in “linux” package in Ubuntu:
  Invalid
Status in “udisks” package in Ubuntu:
  Fix Released

Bug description:
  Binary package hint: udev

  Before I upgraded the udev version of jaunty from 141-1 to 141-1.1,
  top reported about 2% total cpu usage when idle. After the update, it
  rarely drops below 35%. Though top lists udevd among the more cpu
  hungry processes, it is only listed with about 3%, while system (in
  line 3) almost never drops below 20%.

  I am using the amd64 version of Xubuntu 9.04 on a Acer Extensa 5230
  laptop with a 2 GHz Intel Celeron processor, and I have my root, home
  and swap partitions encrypted with luks. I did a fresh install and
  installed nothing but the software updates.

  The output of top looks like this:

  top - 18:47:33 up 15 min,  2 users,  load average: 1.48, 1.99, 1.50
  Tasks: 125 total,   3 running, 122 sleeping,   0 stopped,   0 zombie
  Cpu(s): 11.3%us, 23.9%sy,  0.0%ni, 60.1%id,  0.0%wa,  4.3%hi,  0.3%si,  0.0%st
  Mem:    940212k total,   637176k used,   303036k free,      872k buffers
  Swap:  2103444k total,        0k used,  2103444k free,   346116k cached

    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
    939 root      16  -4 16792  600  296 S  3.0  0.1   0:17.03 udevd
  15937 haldaemo  20   0 36304 4872 3756 S  1.7  0.5   0:04.29 hald
  16403 root      20   0  451m  51m  17m R  1.7  5.6   0:25.92 Xorg
     30 root      15  -5     0    0    0 S  0.7  0.0   0:05.52 scsi_eh_1
   5480 andreas   20   0 19116 1328  988 R  0.3  0.1   0:00.89 top
  22747 andreas   20   0  174m  17m 8960 R  0.3  1.9   0:01.14 xfce4-terminal
      1 root      20   0  4104  924  632 S  0.0  0.1   0:00.87 init
      2 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kthreadd
      3 root      RT  -5     0    0    0 S  0.0  0.0   0:00.00 migration/0
      4 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 ksoftirqd/0
      5 root      RT  -5     0    0    0 S  0.0  0.0   0:00.00 watchdog/0
      6 root      15  -5     0    0    0 S  0.0  0.0   0:00.65 events/0
      7 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 khelper
      8 root      RT  -5     0    0    0 S  0.0  0.0   0:00.00 kstop/0
      9 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kintegrityd/0
  ...

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