Calculate linter.config.jobs in cgroupsv2 environments

[DominicLavery]

Type of Changes

	Type
✓	:bug: Bug fix
✓	:sparkles: New feature

Description

In containers running on cgroupv2 systems _query_cpu currently returns None. This results in sched_getaffinity being used, which will normally return all installed CPUs of the host. This can result in crashes with the error:

concurrent.futures.process.BrokenProcessPool: A process in the process pool was terminated abruptly while the future was running or pending.

The changes here use the CPU quota in v2 systems. max 100000 is the default value, and will continue to result in the hosts CPU count being used.

cpu.weight (the replacement of cpu shares from v1) could also be used, but as it's impact on CPU scheduling is relative to the rest of the cgroup hierarchy it isn't possible to get an accurate value on all systems where pylint may be run. Whereas this method is reliable on any container with a CPU quota

[github-actions[bot]]

🤖 According to the primer, this change has no effect on the checked open source code. 🤖🎉

This comment was generated for commit ff64dd84af8ee9afd0a345d248054bddfc73b0b4

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.80%. Comparing base (68cb5b3) to head (ab7b61b).

Additional details and impacted files

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[github-actions[bot]]

🤖 According to the primer, this change has no effect on the checked open source code. 🤖🎉

This comment was generated for commit ab7b61b0ea4134c577bc221ec1eae80c98210459