On 10/5/23 00:47, Tejun Heo wrote: > On Wed, Sep 20, 2023 at 03:55:12PM +0530, Kamalesh Babulal wrote: >> cgroup v1 or v2 or both controller names can be passed as arguments to >> the 'cgroup_no_v1' kernel parameter, though most of the controller's >> names are the same for both cgroup versions. This can be confusing when >> both versions are used interchangeably, i.e., passing cgroup_no_v1=io >> >> $ sudo dmesg |grep cgroup >> ... >> cgroup: Disabling io control group subsystem in v1 mounts >> cgroup: Disabled controller 'blkio' > > So, making the printed names consistent makes sense but I'm not sure about > not matching "io" anymore. That's gonna break users who already use them, > right? Agreed, users might pass "io" in place of "blkio", I was thinking in terms of cgroup v1 users, for whom it is "blkio" controller but as an argument, "cgroup_no_v1" makes the controllers passed to it, available under cgroup v2, where the controller is named "io", which the user may use interchangeably. Shall I re-send the patch to print the controller legacy_name only? -- Thanks, Kamalesh
