Checked on a machine in my lab with that CPU (Intel Xeon Platinum 8380) and this does not happen there...
So I'd initially blame something related to firmware, perhaps, but since it also resolves with the 5.13 HWE, that is a little confusing. Can you try a different CPU in this machine with 5.4 ( like a Xeon Gold, or Silver, or a smaller Platinum?) And does this happen on other models with the same CPU? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1976511 Title: kernel taint ( warning ) caused by smpboot.c: on 5.4.0 Status in linux package in Ubuntu: Confirmed Bug description: Apr 6 02:33:31 G292-280 kernel: [ 0.007531] ------------[ cut here ]------------ Apr 6 02:33:31 G292-280 kernel: [ 0.007531] sched: CPU #20's llc-sibling CPU #0 is not on the same node! [node: 1 != 0]. Ignoring dependency. Apr 6 02:33:31 G292-280 kernel: [ 0.007531] WARNING: CPU: 20 PID: 0 at /build/linux-hwe-5.4-9Mb2g5/linux-hwe-5.4-5.4.0/arch/x86/kernel/smpboot.c:426 topology_sane.isra.9+0x6c/0x70 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] Modules linked in: Apr 6 02:33:31 G292-280 kernel: [ 0.007531] CPU: 20 PID: 0 Comm: swapper/20 Not tainted 5.4.0-107-generic #121~18.04.1-Ubuntu Apr 6 02:33:31 G292-280 kernel: [ 0.007531] Hardware name: GIGABYTE G292-280-00/MG52-G20-00, BIOS F02 10/28/2021 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] RIP: 0010:topology_sane.isra.9+0x6c/0x70 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] Code: 41 5c 5d c3 80 3d 1e 75 ba 01 00 75 ec 89 f1 41 89 d9 89 fe 45 89 e0 48 c7 c7 b8 00 b4 a6 c6 05 04 75 ba 01 01 e8 b4 c7 03 00 <0f> 0b eb cb 0f 1f 44 00 00 55 0f b6 05 a3 8d f0 01 c6 05 9c 8d f0 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] RSP: 0000:ffffb76b58e17eb8 EFLAGS: 00010086 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffa7264e88 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] RDX: ffffffffa7264e88 RSI: 0000000000000096 RDI: 0000000000000046 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] RBP: ffffb76b58e17ec8 R08: 0000000000000000 R09: 000000000002f680 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] R10: ffff8b69bf800000 R11: 00000000000002c0 R12: 0000000000000001 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] R13: 0000000000000014 R14: 0000000000000014 R15: 0000000000000002 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] FS: 0000000000000000(0000) GS:ffff8b69bf800000(0000) knlGS:0000000000000000 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] CR2: 0000000000000000 CR3: 0000007ee1a0a001 CR4: 0000000000760ee0 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] PKRU: 00000000 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] Call Trace: Apr 6 02:33:31 G292-280 kernel: [ 0.007531] set_cpu_sibling_map+0x14f/0x600 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] start_secondary+0x6e/0x1c0 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] secondary_startup_64+0xa4/0xb0 Apr 6 02:33:31 G292-280 kernel: [ 0.007531] ---[ end trace 789d1f3abd3d96d4 ]--- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1976511/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
