Bug 218951

Summary:	Linux warns `Unknown NUMA node; performance will be reduced`
Product:	Drivers	Reporter:	Paul Menzel (pmenzel+bugzilla.kernel.org)
Component:	PCI	Assignee:	drivers_pci (drivers_pci)
Status:	NEW ---
Severity:	normal	CC:	ionut_n2001
Priority:	P3
Hardware:	All
OS:	Linux
Kernel Version:		Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	Output of `acpidump` on Dell PowerEdge T630 with system firmware 2.4.2

Description Paul Menzel 2024-06-10 20:22:55 UTC

This issue is for attaching files for the discussion [1].


[1]: https://lore.kernel.org/r/a154f694-c48b-4b3b-809f-4b74ec86a924@molgen.mpg.de

Comment 1 Paul Menzel 2024-06-10 20:24:15 UTC

Created attachment 306448 [details]
Output of `acpidump` on Dell PowerEdge T630 with system firmware 2.4.2

Comment 2 sander44 2024-09-05 13:30:59 UTC

I have similar issue with you.

sudo dmesg| grep -i numa
[    0.056282] NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00000000-0xbfffffff]
[    0.056284] NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x83fffffff] -> [mem 0x00000000-0x83fffffff]
[    0.400874] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[    0.563848] pci_bus 0000:00: Unknown NUMA node; performance will be reduced


pci_bus 0000:00: Unknown NUMA node; performance will be reduced


Host: VMware VM Ubuntu 24.04.1
CPU: Intel(R) Xeon(R) Silver 4310 CPU @ 2.10GHz
Kernel: 6.11.0-rc6