https://bugzilla.suse.com/show_bug.cgi?id=1227345 https://bugzilla.suse.com/show_bug.cgi?id=1227345#c3 --- Comment #3 from Takashi Iwai <tiwai@suse.com> --- (In reply to Maxime Thirion from comment #2)

(In reply to Takashi Iwai from comment #1)

...

IIRC, there were relevant bugs in the early 6.9.x kernels, and it's been fixed in the recent 6.9.x release (around 6.9.4).

If I've understood correctly, with the first buggy kernels the cores appeared, but tasks weren't always sent to the other cores?

Here, the cores disappeared from the system with kernel 6.9. Only dmidecode shows me the 4 cores, but only one is activated.

And I have the same problem with the latest kernel available on MicroOS/Tumbleweed:

cloud:~ # uname -a Linux cloud 6.9.7-1-default #1 SMP PREEMPT_DYNAMIC Fri Jun 28 05:50:47 UTC 2024 (a5efffa) x86_64 x86_64 x86_64 GNU/Linux

cloud:~ # dmidecode -t processor |grep Core Family: Core 2 Duo Version: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz Core Count: 4 Core Enabled: 1

Then it's a different bug from what I originally thought. Please check with the latest 6.10-rc kernel in OBS Kernel:HEAD repo, and if the issue is reproducible, better report to the upstream. -- You are receiving this mail because: You are the assignee for the bug.