https://bugzilla.kernel.org/show_bug.cgi?id=218259 --- Comment #2 from Joern Heissler (kernelbugs2012@xxxxxxxxxxxxxxxxx) --- Hi, 1. KSM is already disabled. Didn't try to enable it. 2. NUMA autobalancing was enabled on the host (value 1), not in the guest. When disabled, I can't see the issue anymore. 3. tdp_mmu was "Y", disabling it seems to make no difference. So might be related to NUMA. On older kernels, the flag is 1 as well. There's one difference in the kernel messages that I hadn't noticed before. The newer one prints "pci_bus 0000:7f: Unknown NUMA node; performance will be reduced" (same with ff again). The older ones don't. No idea what this means, if it's important, and can't find info on the web regarding it. I think the kernel is preemptible: "uname -a" shows: "Linux vm123 6.1.0-15-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.66-1 (2023-12-09) x86_64 GNU/Linux" "grep -i" on the config shows: CONFIG_PREEMPT_BUILD=y # CONFIG_PREEMPT_NONE is not set CONFIG_PREEMPT_VOLUNTARY=y # CONFIG_PREEMPT is not set CONFIG_PREEMPT_COUNT=y CONFIG_PREEMPTION=y CONFIG_PREEMPT_DYNAMIC=y CONFIG_PREEMPT_RCU=y CONFIG_HAVE_PREEMPT_DYNAMIC=y CONFIG_HAVE_PREEMPT_DYNAMIC_CALL=y CONFIG_PREEMPT_NOTIFIERS=y CONFIG_DRM_I915_PREEMPT_TIMEOUT=640 # CONFIG_DEBUG_PREEMPT is not set # CONFIG_PREEMPT_TRACER is not set # CONFIG_PREEMPTIRQ_DELAY_TEST is not set Attaching output of "dmesg" and "lspci -v". Perhaps there's something useful in there. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
