Re: some kernel exceptions

["Bezdeka, Florian" <florian.bezdeka@siemens.com>]

[RESEND: Seems my original mail did not make it to the list]

Hi,

On Mon, 2022-12-26 at 15:37 +0800, Yxian.Yao wrote:
> 
> Hi，
> 
> Install the debian11.0 operating system on the machine.，the system
> can start normally.
> But the system is abnormal after using this kernel,linux-5.4.133-
> ipipe-6-xenomai-3.1.1-20221216 (linux-5.4.133, ipipe-core-5.4.133-
> x86-6.patch, xenomai 3.1.1), 
> See the attachment for output information during kernel startup, and
> the kernel outputs some exception messages, as follows.

Linux is failing while trying to initialize the IRQ controler (APIC) of
your application processors (APs) (= non boot CPUs). There seems to be
a mismatch regarding LAPIC IDs.

Such IDs are normally extracted from the APIC ACPI table. Something
seems to go wrong there (taken from your attachment):

[    0.214734] ACPI: x2apic entry ignored

There are a lot of such lines. This makes me wonder if your ACPI tables
are set up properly (which might be a BIOS/Firmware issue). That's
nothing Xenomai/ipipe specific. Does a standard Linux 5.4 boot on that
machine?

[    0.214840] smpboot: Boot CPU (id 255) not listed by BIOS

That points into the same direction. Your boot CPU has a APIC ID of
255, I would expect 0.

[    0.284534] setup_percpu: NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:1 nr_node_ids:1

nr_cpu_ids: 1 is strage. According to the line below we are on a NUMA
system (with one node) and I would expect a higher number of CPUs on
that system. So something is hiding your cores. (At least there is no
maxcpus=1 on your kernel cmdline).

NUMA configuration:
[    0.008196] NUMA: Node 0 [mem 0x00000000-0x7fffffff] + [mem 0x100000000-0x207fffffff] -> [mem 0x00000000-0x207fffffff]

Hope that helps,
Florian

> 
> Please give me some hints!
> 
> Thanks a lot.
> 
> [    2.425873] ------------[ cut here ]------------
> [    2.430270] kernel BUG at arch/x86/kernel/apic/apic.c:1659!
> [    2.435593] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
> [    2.440574] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.133-ipipe-6-xenomai-3.1.1-20221216 #1
> [    2.448851] Hardware name: HP HP Z8 Fury G5 Workstation/88C1, BIOS U61 Ver. 79.01.87 09/22/2022
> [    2.457129] I-pipe domain: Linux
> [    2.460211] RIP: 0010:setup_local_APIC+0x2df/0x310
> [    2.464775] Code: 00 0b 05 b8 66 5b 01 0f 85 f7 fe ff ff 85 d2 7f 3f 48 8b 05 43 36 e4 00 be 00 07 01 00 bf 50 03 00 00 ff 50 10 e9 f6 fe ff ff <0f> 0b 48 8b 4c 24 40 65 48 2b 0c 25 28 00 00 00 75 0a be 00 04 00
> [    2.482628] RSP: 0000:ffffffff82003ea0 EFLAGS: 00010246
> [    2.487606] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff889fffe00000
> [    2.494401] RDX: 0000000000000000 RSI: 00000000fffffeff RDI: 0000000000000020
> [    2.501196] RBP: ffffffff8253d2e0 R08: 0000000000000001 R09: ffffffff820dbc20
> [    2.507989] R10: 0000000000000008 R11: 0000000000000000 R12: 00000000000000d0
> [    2.514786] R13: 0000000000000000 R14: 000000005565f000 R15: 000000005b0ca000
> [    2.521582] FS:  0000000000000000(0000) GS:ffff889fffe00000(0000) knlGS:0000000000000000
> [    2.529285] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    2.534759] CR2: ffff88a07ffff000 CR3: 000000000400a001 CR4: 00000000000606b0
> [    2.541553] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [    2.548348] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
> [    2.555141] Call Trace:
> [    2.557479]  ? __ipipe_do_IRQ+0x87/0xb0
> [    2.561137]  ? __ipipe_do_sync_stage+0x12a/0x160
> [    2.565537]  apic_intr_mode_init+0xb7/0xda
> [    2.569441]  x86_late_time_init+0x12/0x17
> [    2.573262]  start_kernel+0x42e/0x4e7
> [    2.576757]  secondary_startup_64+0xa4/0xb0
> [    2.580744] Modules linked in:
> [    2.583659] ---[ end trace bd3da5ac6eb39a7b ]---
> [    2.588058] RIP: 0010:setup_local_APIC+0x2df/0x310
> [    2.592622] Code: 00 0b 05 b8 66 5b 01 0f 85 f7 fe ff ff 85 d2 7f 3f 48 8b 05 43 36 e4 00 be 00 07 01 00 bf 50 03 00 00 ff 50 10 e9 f6 fe ff ff <0f> 0b 48 8b 4c 24 40 65 48 2b 0c 25 28 00 00 00 75 0a be 00 04 00
> [    2.610482] RSP: 0000:ffffffff82003ea0 EFLAGS: 00010246
> [    2.615460] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff889fffe00000
> [    2.622252] RDX: 0000000000000000 RSI: 00000000fffffeff RDI: 0000000000000020
> [    2.629048] RBP: ffffffff8253d2e0 R08: 0000000000000001 R09: ffffffff820dbc20
> [    2.635841] R10: 0000000000000008 R11: 0000000000000000 R12: 00000000000000d0
> [    2.642637] R13: 0000000000000000 R14: 000000005565f000 R15: 000000005b0ca000
> [    2.649430] FS:  0000000000000000(0000) GS:ffff889fffe00000(0000) knlGS:0000000000000000
> [    2.657135] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    2.662608] CR2: ffff88a07ffff000 CR3: 000000000400a001 CR4: 00000000000606b0
> [    2.669403] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [    2.676198] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
> [    2.682993] Kernel panic - not syncing: Attempted to kill the idle task!
> [    2.689396] Rebooting in 1 seconds..
> [    3.648759] ACPI MEMORY or I/O RESET_REG.