** Also affects: zfs-linux (Ubuntu Zesty)
Importance: Undecided
Status: New
** Also affects: zfs-linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: zfs-linux (Ubuntu Xenial)
Status: New => Fix Released
** Changed in: zfs-linux (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: zfs-linux (Ubuntu Xenial)
Assignee: (unassigned) => Colin Ian King (colin-king)
** Changed in: zfs-linux (Ubuntu Zesty)
Status: New => Confirmed
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Packages, which is subscribed to zfs-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1550301
Title:
ZFS: Set elevator=noop on disks in the root pool
Status in zfs-linux package in Ubuntu:
In Progress
Status in zfs-linux source package in Xenial:
Fix Released
Status in zfs-linux source package in Zesty:
Confirmed
Bug description:
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.
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1550301/+subscriptions
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