Package: release-notes Severity: normal Hi,
Last I checked, only btrfs supports the cgroupv2 I/O controller; this should probably be documented. Alternatively, if more than btrfs (ie: XFS and ext4) supports it, but not other file systems (ie: f2fs, reiser4, jfs, etc) than this should be documented. As far as I can tell, the significance of this is as follows: Buster switched to mq-deadline, which does not support the idle I/O priority, and to get functional ionice the user/sysadmin had to switch to the non-mq CFQ, or bfq. The situation in a default Bullseye install is better, but only for file systems that support the cgroupv2 I/O controller. Regards, Nicholas
