RE: [REGRESSION] soft lockup on boot starting with kernel 6.10 / commit 5186ba33234c9a90833f7c93ce7de80e25fac6f5

I have discovered a 100% reliable soft lockup on boot on my laptop: Purism Librem 14, Intel Core i7-10710U, 48Gb RAM, Samsung Evo Plus 970 SSD, CoreBoot BIOS, grub bootloader, Arch Linux.

The last working release is kernel 6.9.10, every release from 6.10 onwards reliably exhibit the issue, which, based on journalctl logs, seems to be triggered somewhere in systemd-udev: https://gitlab.archlinux.org/-/project/42594/uploads/04583baf22189a0a8bb2f87...

Bisect points to commit 5186ba33234c9a90833f7c93ce7de80e25fac6f5

Does that Intel Core i7-10710U even execute the RDT code? Most client parts don't support RDT. You can check if yours does by looking for "rdt_a" in /proc/cpuinfo.

-Tony