[Bug 160448] Re: the commit interval for the ext3 filesystem should be higher than 5 seconds for laptop users by default (at least while on battery)

[Phillip Susi]

** Package changed: util-linux (Ubuntu) => pm-utils (Ubuntu)

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Title:
  the commit interval for the ext3 filesystem should be higher than 5
  seconds for laptop users by default (at least while on battery)

Status in “pm-utils” package in Ubuntu:
  Confirmed

Bug description:
  The commit interval for the ext3 filesystem should be higher than 5 seconds for laptop users (at least while on battery) to prevent unnecessary disk-activity when the head is parked or the drive is spun down. ext3 partitions should be mounted with commit=X where X is a number in seconds.
  /proc/sys/vm/dirty_writeback_centisecs and /proc/sys/vm/dirty_expire_centiseconds should be changed appropriately.

  More information :
  http://www.ussg.iu.edu/hypermail/linux/kernel/0208.1/0464.html
  http://linux.derkeiler.com/Newsgroups/comp.os.linux.portable/2005-11/0026.html

  This might be one of the contributors to the famous Load_Cycle_Count bugs :
  https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/17216
  https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/59695

  A relevant comment by Bart Samwell :
  https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/17216/comments/83

  This should probably be done through laptop-mode taking Bart Samwell's
  comment in consideration. So laptop-mode should probably be enabled by
  default (with sane defaults) while on battery in the future. It can't
  be enabled by default right now because it is causing system hangs for
  some laptops see : https://bugs.launchpad.net/ubuntu/+source/acpi-
  support/+bug/59695/comments/224

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