On 27 Jan 2021, at 20:39, David Bremner <brem...@debian.org> wrote: > > Package: schroot > Version: 1.6.10-11+b1 > Severity: normal > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > As you can see with session below, schroot throws away the processor > affinities present in the parent process. This breaks a common > strategy (used e.g. by slurm) for sharing multi-processor machines.
We don’t actively do anything within schroot to change this, so it must be a side-effect of some action it takes during session setup. The main actions under our control are basic fork/chroot/setuid/setgid/exec and I doubt these are responsible. The PAM auth and session handling is I think the most likely culprit, and this is not under our direct control. Is there a particular PAM module which can change these cpusets? If so, can you edit the schroot PAM configuration and see if it can be disabled this way? Possibly in @common-session? Thanks, Roger
