Just a curiosity... Isn't this related to the following BUGs: Ubuntu server uses CFQ scheduler instead of deadline: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1008400
Kernel I/O scheduling writes starving reads, local DoS: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1064521 ??? What can be done? Edit the file: /etc/default/grub and add: GRUB_CMDLINE_LINUX="elevator=deadline" run: update-grub reboot Test it again... Best, Thiago -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1023755 Title: Precise kernel locks up while dd to /dev/mapper files > 1Gb (was: Unable to delete volume) To manage notifications about this bug go to: https://bugs.launchpad.net/cinder/+bug/1023755/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
