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

[Hugues Bruant]

On Mon, Sep 9, 2024 at 9:10 AM Luck, Tony <tony.luck at intel.com> wrote:
>
> > 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.
Thanks for the suggestion. You're right, I do not see `rdt_a` in `/proc/cpuinfo`