[systemd-devel] Is it meant to be possible to set IO[Read|Write]BandwidthMax on a slice ?

[Hadrien Grasland]

Le 08/04/2021 à 16:11, Lennart Poettering a écrit :
> On Do, 08.04.21 12:24, Hadrien Grasland (hadrien.grasland at ijclab.in2p3.fr) wrote:
>
>> Hi everyone,
>>
>> In a scenario where running benchmarks on dedicated hardware is not
>> possible, I'm trying to momentarily cap the I/O bandwidth used by
>> interactive user sessions while benchmarks are running, in order to improve
>> the stability of said benchmark's I/O performance.
> Is this on cgroupsv1 or cgroupsv2?
>
> IIRC there was some issue that the block io controller wasn't fully
> recursive on cgroupsv1. It should work on cgroupsv2.

This is on a hybrid cgroup configuration. I (perhaps mistakenly) assumed 
that modern systemd (v246) will use the cgroups v2 hierarchy in that 
case, even though cgroups v1 is still exposed for compatibility with 
older apps.

Hadrien