[Linux-next-6-10-20240722][PowerPC] Observing Kernel Warnings at kernel/time/timer_migration.c:1714

From: Venkat Rao Bagalkote
Date: Tue Jul 23 2024 - 00:02:27 EST


Greetings!!!


Observing kernel warnings at kernel/time/timer_migration.c:1714 while booting with linux-next-6-10-20240722 kernel on PowerPC system.


[    0.006496] ------------[ cut here ]------------
[    0.006500] WARNING: CPU: 0 PID: 1 at kernel/time/timer_migration.c:1714 tmigr_cpu_prepare+0x130/0x154
[    0.006507] Modules linked in:
[    0.006510] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.10.0-next-20240722-auto #1
[    0.006514] Hardware name: IBM,9009-42A POWER9 (architected) 0x4e0202 0xf000005 of:IBM,FW950.A0 (VL950_141) hv:phyp pSeries
[    0.006515] NIP:  c00000000029ac10 LR: c00000000016c4b4 CTR: c00000000029aae0
[    0.006517] REGS: c0000000bb4c7740 TRAP: 0700   Not tainted (6.10.0-next-20240722-auto)
[    0.006519] MSR:  8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE>  CR: 2800428f  XER: 0000000d
[    0.006527] CFAR: c00000000029ab24 IRQMASK: 0
[    0.006527] GPR00: c00000000016c4b4 c0000000bb4c79e0 c0000000015a3d00 0000000000000000
[    0.006527] GPR04: 0000000000000040 0000000000000001 0000000000000000 0000000000000000
[    0.006527] GPR08: 00000007fadd0000 c00000000223c1b8 c000000002cfa568 c000000002cfa568
[    0.006527] GPR12: c00000000029aae0 c000000003020000 c0000000000112ac 0000000000000000
[    0.006527] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.006527] GPR20: 0000000000000000 c000000002d0b210 c000000002c71e88 c0000007fd007808
[    0.006527] GPR24: 0000000000000000 c00000000029aae0 c00000000029aae0 00000007fadd0000
[    0.006527] GPR28: c000000002d0c000 c000000002237808 c0000007fd00c1b8 0000000000000000
[    0.006553] NIP [c00000000029ac10] tmigr_cpu_prepare+0x130/0x154
[    0.006557] LR [c00000000016c4b4] cpuhp_invoke_callback+0x1e4/0x7e8
[    0.006562] Call Trace:
[    0.006563] [c0000000bb4c79e0] [80000000ffff8000] 0x80000000ffff8000 (unreliable)
[    0.006567] [c0000000bb4c7a20] [c0000000bb4c7af8] 0xc0000000bb4c7af8
[    0.006569] [c0000000bb4c7ab0] [c00000000016d200] cpuhp_issue_call+0x210/0x274
[    0.006572] [c0000000bb4c7b00] [c00000000016d82c] __cpuhp_setup_state_cpuslocked+0x1c4/0x3b0
[    0.006576] [c0000000bb4c7bc0] [c00000000016de1c] __cpuhp_setup_state+0xb8/0x1d8
[    0.006580] [c0000000bb4c7c20] [c0000000020496a0] tmigr_init+0x1b0/0x254
[    0.006586] [c0000000bb4c7c90] [c000000000010e78] do_one_initcall+0x60/0x398
[    0.006589] [c0000000bb4c7d70] [c000000002006ec4] kernel_init_freeable+0x1d4/0x370
[    0.006595] [c0000000bb4c7de0] [c0000000000112d8] kernel_init+0x34/0x26c
[    0.006598] [c0000000bb4c7e50] [c00000000000df7c] ret_from_kernel_user_thread+0x14/0x1c
[    0.006600] --- interrupt: 0 at 0x0
[    0.006602] Code: e8010050 eb810020 eba10028 3920ffea 38210040 ebc1fff0 2c0a0000 7c0803a6 7c69f89e ebe1fff8 7c6307b4 4e800020 <0fe00000> 4bffff14 60000000 60000000
[    0.006612] ---[ end trace 0000000000000000 ]---


Bad Commit: 07d1022d1680b34a14e6390e3fa978f00c82dae4.


Reverting the above commit, issue is not seen.


Regards,

Venkat.