Enable new useful kernel configs in next release cycle

[edubart]

Context

There are some kernel configs that might enable cool use cases, we should try to enable them on next Kernel release cycle:

• DAX (Direct Access), it's a way to have more efficient filesystems that bypass kernel page cache.
• ERORFS (Enhanced Read-Only File System), it's a more efficient compressed read-only filesystem.
• CRIU (Checkpoint and Restore in Userspace), enables checkpoint/restore of Linux processes.
• FUSE (Filesystem in Userspace), allows to mount filesystems as an user.
• Verify configs needed to really boot Ubuntu and other major Linux distributions
• Verify configs needed to use LinuxKit

Possible solutions

Check which kernel config options are needed, test each functionality.

[endersonmaia]

CRIU (Checkpoint and Restore in Userspace), enables checkpoint/restore of Linux processes.

There's a criu check command that verifies if the kernel has all it needs.

---

From: https://criu.org/Installation#Other_stuff

When building, we should pick just what makes sense inside the CM,

For ex:

libdrm-devel (RPM) / libdrm-dev (DEB) If available, CRIU will be compiled with support for AMD GPUs.

This won't be used inside CM, right?

[endersonmaia]

https://criu.org/Linux_kernel