** Attachment added: "Refreshed & re-tested debdiff against 0.6.5.6." https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1550301/+attachment/4634753/+files/zfs-scheduler.debdiff.2
** Description changed: ZFS-on-Linux has its own I/O scheduler, so it sets the "noop" elevator on whole disks used in a pool. https://github.com/zfsonlinux/zfs/issues/90 It does not set the scheduler for a disk if a partition is used in a pool out of respect for the possibility that there are non-ZFS partitions on the same disk. https://github.com/zfsonlinux/zfs/issues/152 For regular pools, the recommendation is to use whole disks. For a root pools, it's just the opposite. The typical case is that partitions are used. And, for root pools, it is unlikely that the same disks have non- - ZFS filesystems. Therefore, I think we want to set the "noop" scheduler - for disks in the root pool. + ZFS filesystems. + + The debdiff in comment #5 applies cleanly to the latest package and + functions correctly. This is an important change for root-on-ZFS users. + It has no effect on non-root-on-ZFS installs, because the code is only + in the zfs-initramfs package. ** Summary changed: - ZFS: Set elevator=noop on disks in the root pool + [FFe] ZFS: Set elevator=noop on disks in the root pool -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550301 Title: [FFe] ZFS: Set elevator=noop on disks in the root pool To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1550301/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
