linux-kernel - [Linux-next-6-10-20240722][PowerPC] Observing Kernel Warnings at kernel/time/timer

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Message-ID: <81b8966a-5c11-4413-a57f-fa2216b15b15@linux.vnet.ibm.com>
Date: Tue, 23 Jul 2024 09:31:47 +0530
From: Venkat Rao Bagalkote <venkat88@...ux.vnet.ibm.com>
To: anna-maria@...utronix.de, tglx@...utronix.de, frederic@...nel.org,
        linux-kernel@...r.kernel.org, mingo@...nel.org, sfr@...b.auug.org.au
Subject: [Linux-next-6-10-20240722][PowerPC] Observing Kernel Warnings at
 kernel/time/timer_migration.c:1714

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.