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Bug#993311: Support for cgroup v2 via cgroup-tools

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El 31/08/21 a las 14:45, Thomas Goirand escribió:
> Hi Santiago,
> 
> Thanks for this bug report, I'll be working on it.

Thanks!

> 
> On 8/30/21 5:19 PM, Santiago Ruano Rincón wrote:
> > To know if cgroup v2 is supported, one way is to
> > `grep cgroup2 /proc/mounts`
> 
> I am really unsure about this. On Bullseye, for example, we do have
> cgroup2 mounted just like in Sid, though the new syntax wont work. What
> we need here is a way to tell what version of the cgset/cgcreate
> userland binary is there, preferably with something distribution agnostic...

Mmm, you need to make sure of two things: 1) the version of cgroup fs
available in the system, and 2) the version of cgroup-tools (which is
independent of 1)). You can install cgroup-tools without
mounting any cgroup file system, so I don't think knowing the version of
cgset/cgcreate is a fully reliable solution.

For 2), I'd prefer a versioned Depends on cgroup-tools (>= 2.0-2).

> Maybe the only way is to just attempt the old style cgset, see if it
> fails, and if it does, do v2 style cgset?

For 1), I'd chose to test v2 first, and then v1. Remember that v1 is not
mounted by default.

> I'd prefer a better way to detect the cgroup version if available.
...

If you can propose a better way, I am all ears.

Cheers,

 -- S

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Bug#993311: Support for cgroup v2 via cgroup-tools Santiago Ruano Rincón <santiago.ruano-rincon@imt-atlantique.fr> - 2021-08-30 17:30 +0200
  Bug#993311: Support for cgroup v2 via cgroup-tools Thomas Goirand <thomas@goirand.fr> - 2021-08-31 14:50 +0200
    Bug#993311: Support for cgroup v2 via cgroup-tools Santiago Ruano Rincón <santiago.ruano-rincon@imt-atlantique.fr> - 2021-08-31 15:50 +0200
      Bug#993311: Support for cgroup v2 via cgroup-tools Thomas Goirand <zigo@debian.org> - 2021-09-01 17:30 +0200

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