← Back to team overview

kernel-packages team mailing list archive

[Bug 1008400] Re: Ubuntu server uses CFQ scheduler instead of deadline


BTW, that IBM article... it doesn't mention what versions they used,
which I think is very important :-(.

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  Ubuntu server uses CFQ scheduler instead of deadline

Status in “linux” package in Ubuntu:
  In Progress

Bug description:
  Ubuntu server now uses the '-generic' kernel, as the '-server' kernel
  doesn't exist anymore. With this change the default server disk
  scheduler changed from deadline to CFQ. This is very bad for servers,
  deadline should absolutely be the default for servers.

  For example we moved some KVM images to an Ubuntu 12.04 server, but we
  had to revert as we got lots of disk errors and eventually frozen
  disks on these KVM's due to write timeouts. It took us a while before
  we found out that this 12.04 server used CFQ, which surprised us a

To manage notifications about this bug go to: