https://bugzilla.suse.com/show_bug.cgi?id=1225968 Bug ID: 1225968 Summary: Since kernel 6.9, applications running on only 1 core Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: x86-64 OS: Linux Status: NEW Severity: Major Priority: P5 - None Component: Kernel Assignee: kernel-bugs@opensuse.org Reporter: ivan.topolsky@isb-sib.ch QA Contact: qa-bugs@suse.de Target Milestone: --- Found By: --- Blocker: --- Created attachment 875310 --> https://bugzilla.suse.com/attachment.cgi?id=875310&action=edit excerpt of the journal on kernel 6.9.1 (based on forum thread: https://forums.opensuse.org/t/since-kernel-6-9-running-on-only-1-core/175460) Since updating my openSUSE Tumbleweed install from kernel 6.8.9 to kernels 6.9.x, all my applications (such as firefox) run on mostly only 1 core of the CPU. CPU is AMD FX 8350 8 core (as 4 modules of 2 half-cores which share their FPU) Motherboard is GA-990FXA-UD7 (rev 1.x) (firmware is BIOS with some EFI compatibility layer. Not UEFI like rev 3.x) on kernels 6.9.1 and 6.9.3, while smpboot is initialising the other cores, I get a bunch of errors, which disappear if I boot into version 6.8.9 instead (See linked thread / attachment). This is then followed by:
boot.6.9.txt:jun 03 10:02:33 saturn kernel: mtrr: your CPUs had inconsistent variable MTRR settings boot.6.9.txt:jun 03 10:02:33 saturn kernel: mtrr: probably your BIOS does not setup all CPUs. boot.6.9.txt:jun 03 10:02:33 saturn kernel: mtrr: corrected configuration.
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