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

[Luck, Tony]

> 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/04583baf22189a0a8bb2f8773096e013/lockup.log
> 
> 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