[process] Capture information about sched_ext

[jcastill]

Sched_ext is an extensible scheduler class which
allows a BPF program to hook into core scheduler
code paths to implement a custom scheduler.
This patch captures some initial information about sched_ext from sysfs.

Related: RHEL-70330

---

Please place an 'X' inside each '[]' to confirm you adhere to our Contributor Guidelines

• Is the commit message split over multiple lines and hard-wrapped at 72 characters?
• Is the subject and message clear and concise?
• Does the subject start with [plugin_name] if submitting a plugin patch or a [section_name] if part of the core sosreport code?
• Does the commit contain a Signed-off-by: First Lastname [email protected]?
• Are any related Issues or existing PRs properly referenced via a Closes (Issue) or Resolved (PR) line?
• Are all passwords or private data gathered by this PR obfuscated?

[jcastill]

WiP for now. This will be in kernel 6.12 and we'll need to capture this information as soon as is available.

[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo yum install -y dnf-plugins-core on RHEL 8
• sudo dnf install -y dnf-plugins-core on Fedora
• dnf copr enable packit/sosreport-sos-3867
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.

[arif-ali]

You could probably still add it, sos does ignore files/folders that it doesn't see. So merging it before 4.9.0 shouldn't be a problem imho

[jcastill]

True, I'm just reticent to do so because I haven't been able to test it yet.
If I manage to test linux-next before next week I'll move it out of draft PR.

[jcastill]

Tested it in Ubuntu 24.04 and Fedora 41 with and without SCHED_CLASS_EXT=y and it works as expected, so moving this out of draft.