Re: cgroups(7): documenting /sys/kernel/cgroup files

Hello Roman,

On 8 January 2018 at 22:11, Michael Kerrisk (man-pages)
[off-list ref] wrote:

Hello Roman,

I wrote cgroups(7) text below to document the files added by you in
Linux 4.15. Could you let me know if the following text is okay please:

   /sys/kernel/cgroup files
       /sys/kernel/cgroup/delegate (since Linux 4.15)
              This file exports a list of the cgroups v2 files  (one  per
              line) that are delegatable (i.e., whose ownership should be
              changed to the user ID of the delegatee).  In  the  future,
              the  set  of delegatable files may change or grow, and this
              file provides a way for the  kernel  to  inform  user-space
              applications of which files must be delegated.  As at Linux
              4.15, one sees the following when inspecting this file:

                  $ cat /sys/kernel/cgroup/delegate
                  cgroup.procs
                  cgroup.subtree_control

I have a question about /sys/kernel/cgroup/delegate: why does this
file not list cgroup.threads, since that is also a file that
(potentially) should be delegated?

Cheers,

Michael