[Bug 381059] Re: use zram-config by default

[Oliver Grawert]

zram-config is in main since it exists, all thats needed is to seed it
generally in the ship seed and to have some detection code in ubiquity
that installs it by default in setups where it makes sense to have it
(low  ram)

** Also affects: ubiquity (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: zram-config (Ubuntu)
       Status: New => Invalid

** Changed in: ubiquity (Ubuntu)
       Status: New => Confirmed

** Changed in: ubiquity (Ubuntu)
   Importance: Undecided => Wishlist

** Also affects: ubiquity (Ubuntu Raring)
   Importance: Wishlist
       Status: Confirmed

** Also affects: linux (Ubuntu Raring)
   Importance: Undecided
       Status: Confirmed

** Also affects: zram-config (Ubuntu Raring)
   Importance: Undecided
       Status: Invalid

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https://bugs.launchpad.net/bugs/381059

Title:
  use zram-config by default

Status in “linux” package in Ubuntu:
  Confirmed
Status in “ubiquity” package in Ubuntu:
  Confirmed
Status in “zram-config” package in Ubuntu:
  Invalid
Status in “linux” source package in Raring:
  Confirmed
Status in “ubiquity” source package in Raring:
  Confirmed
Status in “zram-config” source package in Raring:
  Invalid

Bug description:
  There is already zram-config in Ubuntu, a package to enable compressed
  RAM swap: https://launchpad.net/ubuntu/+source/zram-config

  Starting with kernel 3.8 zram (a rewrite of older compcache) is out of
  staging. Please enable it by default.

  See also:
  http://www.webupd8.org//2011/10/increased-performance-in-linux-with.html
  https://launchpad.net/~shnatsel/+archive/zram

  === Original description ===

  Including compcache by default can have a number of benefits for the
  average, and not so average, Ubuntu user.

  For the average user, compcache will decrease disk swapping, which
  will increase perceived performance and decrease hits, which for
  laptop users will improve battery life. Since many users use laptops
  and netbooks these days, this is a big audience and would make many
  people happy. Desktop users will also benefit, as their disks will be
  less active and their electric bills may go down a tiny bit.

  For the not-so-average user,  such as those that run virtualization,
  they can run more VMs. With Ubuntu striving to be bigger in the server
  space, this could be a big deal. For me, I (unfortunately) run Windows
  in KVM, and it appears that enabling compcache improves my VM's
  performance.

  Embedded devices and netbooks (such as those that run Ubuntu Netbook
  Remix) will benefit, as they have little RAM, and since compcache sort
  of increases RAM, it will make these devices more capable.

  Since compcache is already in the Ubuntu kernel (see bug 200765), the
  only thing left is to either add an initramfs script or a udev script
  (IMHO, the udev approach is cleaner) as described here:
  https://wiki.ubuntu.com/Compcache

  compcache: http://code.google.com/p/compcache/

  Thanks!

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