* [next20260529]powerpc/pseries: multiple WARNs: RCU not watching for tracepoint and lockdep_hardirq_context() during boot and cpuidle (Power11)
@ 2026-06-01 13:27 Venkat Rao Bagalkote
2026-06-02 15:24 ` Shrikanth Hegde
0 siblings, 1 reply; 3+ messages in thread
From: Venkat Rao Bagalkote @ 2026-06-01 13:27 UTC (permalink / raw)
To: Peter Zijlstra, Shrikanth Hegde, Srikar Dronamraju,
Mukesh Kumar Chaurasiya (IBM), Madhavan Srinivasan
Cc: LKML, linuxppc-dev, Paul E. McKenney, Ingo Molnar
Greetings!!!
I am observing multiple reproducible WARN_ONs related to RCU and lockdep
IRQ state tracking on a Power11 pSeries system when running on latest
linux-next kernel.
Environment:
Architecture: ppc64le (Power11, pSeries LPAR)
Kernel: 7.1.0-rc5-next-20260529
Config: PREEMPT(lazy)
CONFIG_LOCKDEP=y
CONFIG_PROVE_LOCKING=y
Warning1:
[ 0.008277] ------------[ cut here ]------------
[ 0.008285] RCU not watching for tracepoint
[ 0.008294] WARNING: ./include/trace/events/preemptirq.h:36 at
trace_hardirqs_off+0x16c/0x1a0, CPU#1: swapper/1/0
[ 0.008306] Modules linked in:
[ 0.008316] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted
7.1.0-rc5-next-20260529 #1 PREEMPT(lazy)
[ 0.008322] Hardware name: IBM,9080-HEX Power11 (architected)
0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
[ 0.008327] NIP: c0000000004bb2a8 LR: c0000000004bb2a4 CTR:
0000000000000000
[ 0.008331] REGS: c0000000049cb690 TRAP: 0700 Not tainted
(7.1.0-rc5-next-20260529)
[ 0.008336] MSR: 8000000000021033 <SF,ME,IR,DR,RI,LE> CR: 44000208
XER: 00000005
[ 0.008348] CFAR: c00000000022e9d4 IRQMASK: 3
[ 0.008348] GPR00: c0000000004bb2a4 c0000000049cb950 c000000001ccf100
000000000000001f
[ 0.008348] GPR04: 3fffffffffff7fff c0000000049cb740 c0000000049cb738
0000000000000000
[ 0.008348] GPR08: c0000000029d1230 0000000000000001 c0000000049e8000
0000000000000003
[ 0.008348] GPR12: c000000002d514e0 c000000effffeb00 0000000000000000
0000000000000000
[ 0.008348] GPR16: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 0.008348] GPR20: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 0.008348] GPR24: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 0.008348] GPR28: 0000000000000000 0000000000000001 c000000002414988
c00000000005be40
[ 0.008403] NIP [c0000000004bb2a8] trace_hardirqs_off+0x16c/0x1a0
[ 0.008408] LR [c0000000004bb2a4] trace_hardirqs_off+0x168/0x1a0
[ 0.008413] Call Trace:
[ 0.008416] [c0000000049cb950] [c0000000004bb2a4]
trace_hardirqs_off+0x168/0x1a0 (unreliable)
[ 0.008423] [c0000000049cb9d0] [c00000000005be40]
arch_interrupt_enter_prepare+0xa0/0x19c
[ 0.008430] [c0000000049cba00] [c00000000005bf78]
doorbell_exception+0x3c/0x4c4
[ 0.008436] [c0000000049cbaa0] [c00000000000a2fc]
doorbell_super_common_virt+0x28c/0x290
[ 0.008443] ---- interrupt: a00 at plpar_hcall_norets_notrace+0x18/0x2c
[ 0.008449] NIP: c0000000001b4fc8 LR: c0000000001bcea0 CTR:
0000000000000000
[ 0.008453] REGS: c0000000049cbad0 TRAP: 0a00 Not tainted
(7.1.0-rc5-next-20260529)
[ 0.008457] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR:
24000008 XER: 00000000
[ 0.008469] CFAR: 0000000000000000 IRQMASK: 0
[ 0.008469] GPR00: 0000000000000000 c0000000049cbd90 c000000001ccf100
0000000000000000
[ 0.008469] GPR04: 0000000000000000 8004000038407c10 0000000000000000
0000000000000003
[ 0.008469] GPR08: 0000000000000001 0000000000000000 0000000000000090
0000000000000001
[ 0.008469] GPR12: 8004000038407c00 c000000effffeb00 0000000000000000
000000002ef01820
[ 0.008469] GPR16: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 0.008469] GPR20: 0000000000000000 0000000000000000 0000000000000000
0000000000000001
[ 0.008469] GPR24: 0000000000000001 000000000000dedc c000000003086150
0000000000000001
[ 0.008469] GPR28: c0000000049e8000 c000000002241548 c000000002241550
c000000002241548
[ 0.008523] NIP [c0000000001b4fc8] plpar_hcall_norets_notrace+0x18/0x2c
[ 0.008528] LR [c0000000001bcea0] pseries_lpar_idle.part.0+0x74/0x160
[ 0.008533] ---- interrupt: a00
[ 0.008536] [c0000000049cbd90] [c0000000049cbe30] 0xc0000000049cbe30
(unreliable)
[ 0.008544] [c0000000049cbe10] [c000000000022c5c]
arch_cpu_idle+0x4c/0x120
[ 0.008551] [c0000000049cbe30] [c0000000015afe70]
default_idle_call+0x154/0x454
[ 0.008558] [c0000000049cbec0] [c0000000002d3dfc]
cpuidle_idle_call+0x2dc/0x2e0
[ 0.008565] [c0000000049cbf10] [c0000000002d3f48] do_idle+0x148/0x1f0
[ 0.008571] [c0000000049cbf60] [c0000000002d43c8]
cpu_startup_entry+0x4c/0x50
[ 0.008578] [c0000000049cbf90] [c00000000006371c]
start_secondary+0x27c/0x28c
[ 0.008585] [c0000000049cbfe0] [c00000000000e258]
start_secondary_prolog+0x10/0x14
[ 0.008590] Code: 4bfffcc4 60000000 3d220132 8929db46 2c090000
4082ff94 3c62ffd6 3d220132 3863d398 9ba9db46 4bd73655 60000000
<0fe00000> 60000000 4bffff74 60000000
[ 0.008611] irq event stamp: 20
[ 0.008614] hardirqs last enabled at (19): [<c0000000002d3dfc>]
cpuidle_idle_call+0x2dc/0x2e0
[ 0.008620] hardirqs last disabled at (20): [<c00000000005be40>]
arch_interrupt_enter_prepare+0xa0/0x19c
[ 0.008625] softirqs last enabled at (0): [<c00000000022b6ac>]
copy_process+0xb24/0x1dec
[ 0.008632] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 0.008637] ---[ end trace 0000000000000000 ]---
Warning2:
[ 0.010098] ------------[ cut here ]------------
[ 0.010103] DEBUG_LOCKS_WARN_ON(lockdep_hardirq_context())
[ 0.010107] WARNING: kernel/locking/lockdep.c:4406 at
lockdep_hardirqs_on_prepare+0x22c/0x2d4, CPU#0: swapper/0/1
[ 0.010116] Modules linked in:
[ 0.010120] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W
7.1.0-rc5-next-20260529 #1 PREEMPT(lazy)
[ 0.010125] Tainted: [W]=WARN
[ 0.010127] Hardware name: IBM,9080-HEX Power11 (architected)
0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
[ 0.010131] NIP: c00000000031549c LR: c000000000315498 CTR:
0000000000000000
[ 0.010135] REGS: c0000000045bf100 TRAP: 0700 Tainted: G W
(7.1.0-rc5-next-20260529)
[ 0.010139] MSR: 8000000002021033 <SF,VEC,ME,IR,DR,RI,LE> CR:
44044228 XER: 00000005
[ 0.010147] CFAR: c00000000022e9d4 IRQMASK: 3
[ 0.010147] GPR00: c000000000315498 c0000000045bf3c0 c000000001ccf100
000000000000002e
[ 0.010147] GPR04: 3fffffffffff7fff c0000000045bf1b0 c0000000045bf1a8
0000000000000000
[ 0.010147] GPR08: c0000000029d1230 0000000000010002 c0000000048b2b00
0000000000000003
[ 0.010147] GPR12: c000000002d514e0 c000000003ea1000 c000000000011ae4
0000000000000000
[ 0.010147] GPR16: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 0.010147] GPR20: 0000000000000000 0000000000000004 c000000000272684
c0000000029bb0c0
[ 0.010147] GPR24: 0000000ebc171000 c000000ebeb63850 c000000003084d00
c00000000308b2d0
[ 0.010147] GPR28: c00000000002a488 0000000000000001 0000000000000000
c000000002246e08
[ 0.010188] NIP [c00000000031549c]
lockdep_hardirqs_on_prepare+0x22c/0x2d4
[ 0.010192] LR [c000000000315498] lockdep_hardirqs_on_prepare+0x228/0x2d4
[ 0.010196] Call Trace:
[ 0.010198] [c0000000045bf3c0] [c000000000315498]
lockdep_hardirqs_on_prepare+0x228/0x2d4 (unreliable)
[ 0.010204] [c0000000045bf430] [c0000000004bb778]
trace_hardirqs_on+0xec/0x1b0
[ 0.010209] [c0000000045bf4b0] [c0000000015ad574]
irqentry_exit+0x58c/0xe1c
[ 0.010213] [c0000000045bf540] [c00000000002a488]
timer_interrupt+0x210/0x564
[ 0.010219] [c0000000045bf5f0] [c00000000003b960]
__replay_soft_interrupts+0x14c/0x374
[ 0.010224] [c0000000045bf7d0] [c00000000003bd74]
arch_local_irq_restore.part.0+0x1ec/0x224
[ 0.010230] [c0000000045bf810] [c0000000015c17d4]
_raw_spin_unlock_irqrestore+0x54/0xac
[ 0.010235] [c0000000045bf840] [c0000000002cdd54]
set_user_nice+0x110/0x220
[ 0.010240] [c0000000045bf8e0] [c000000000266a94]
create_worker+0x13c/0x310
[ 0.010245] [c0000000045bf9a0] [c0000000002726f4]
workqueue_prepare_cpu+0x70/0xe4
[ 0.010251] [c0000000045bf9e0] [c000000000232604]
cpuhp_invoke_callback+0x1e8/0x3c0
[ 0.010256] [c0000000045bfa50] [c000000000232924]
__cpuhp_invoke_callback_range+0x148/0x230
[ 0.010261] [c0000000045bfaf0] [c000000000234f68] _cpu_up+0x19c/0x3cc
[ 0.010265] [c0000000045bfbb0] [c00000000023533c] cpu_up+0x1a4/0x1f4
[ 0.010269] [c0000000045bfc40] [c00000000203d1f4]
bringup_nonboot_cpus+0xbc/0x128
[ 0.010275] [c0000000045bfca0] [c00000000204b98c] smp_init+0x44/0xd0
[ 0.010279] [c0000000045bfd00] [c000000002006d4c]
kernel_init_freeable+0x23c/0x3b0
[ 0.010284] [c0000000045bfdc0] [c000000000011b0c] kernel_init+0x30/0x274
[ 0.010288] [c0000000045bfe30] [c00000000000debc]
ret_from_kernel_user_thread+0x14/0x1c
[ 0.010292] ---- interrupt: 0 at 0x0
[ 0.010296] Code: 4182ff74 3d22013c 3929c1d4 81290000 2c090000
4082ff60 3c82ffda 3c62ffd9 3884f998 38634590 4bf19461 60000000
<0fe00000> 4bffff40 60000000 60000000
[ 0.010310] irq event stamp: 7440
[ 0.010312] hardirqs last enabled at (7439): [<c0000000015c1824>]
_raw_spin_unlock_irqrestore+0xa4/0xac
[ 0.010317] hardirqs last disabled at (7440): [<c00000000003bc30>]
arch_local_irq_restore.part.0+0xa8/0x224
[ 0.010323] softirqs last enabled at (0): [<c00000000022b6ac>]
copy_process+0xb24/0x1dec
[ 0.010328] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 0.010331] ---[ end trace 0000000000000000 ]---
Warning3:
[ 1.718239] ------------[ cut here ]------------
[ 1.718247] RCU not watching for tracepoint
[ 1.718255] WARNING: ./include/trace/events/preemptirq.h:40 at
trace_hardirqs_on+0x180/0x1b0, CPU#19: swapper/19/0
[ 1.718266] Modules linked in: ibmvscsi ibmveth scsi_transport_srp
pseries_wdt
[ 1.718275] CPU: 19 UID: 0 PID: 0 Comm: swapper/19 Tainted: G
W 7.1.0-rc5-next-20260529 #1 PREEMPT(lazy)
[ 1.718280] Tainted: [W]=WARN
[ 1.718283] Hardware name: IBM,9080-HEX Power11 (architected)
0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
[ 1.718287] NIP: c0000000004bb80c LR: c0000000004bb808 CTR:
0000000000000000
[ 1.718290] REGS: c000000004a4b9e0 TRAP: 0700 Tainted: G W
(7.1.0-rc5-next-20260529)
[ 1.718294] MSR: 8000000002823033 <SF,VEC,VSX,FP,ME,IR,DR,RI,LE>
CR: 44000208 XER: 00000005
[ 1.718305] CFAR: c00000000022e9d4 IRQMASK: 3
[ 1.718305] GPR00: c0000000004bb808 c000000004a4bca0 c000000001ccf100
000000000000001f
[ 1.718305] GPR04: 3fffffffffff7fff c000000004a4ba90 c000000004a4ba88
0000000ebe5e2000
[ 1.718305] GPR08: 0000000000000027 0000000000000002 c000000004a62b00
0000000000000003
[ 1.718305] GPR12: c000000002d514e0 c000000effff1300 0000000000000000
000000002ef01a60
[ 1.718305] GPR16: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 1.718305] GPR20: 0000000000000000 0000000000000000 0000000000000000
00000000666a3c88
[ 1.718305] GPR24: c00000000105088c 000000000000dedc c000000003084d00
0000000000000000
[ 1.718305] GPR28: c000000ec09fe440 0000000000000001 c000000002414988
c00000000003bca8
[ 1.718347] NIP [c0000000004bb80c] trace_hardirqs_on+0x180/0x1b0
[ 1.718351] LR [c0000000004bb808] trace_hardirqs_on+0x17c/0x1b0
[ 1.718355] Call Trace:
[ 1.718357] [c000000004a4bca0] [c0000000004bb808]
trace_hardirqs_on+0x17c/0x1b0 (unreliable)
[ 1.718362] [c000000004a4bd20] [c00000000003bca8]
arch_local_irq_restore.part.0+0x120/0x224
[ 1.718369] [c000000004a4bd60] [c0000000015b065c] snooze_loop+0xa0/0x270
[ 1.718374] [c000000004a4bda0] [c0000000015af06c]
cpuidle_enter_state+0x110/0x8fc
[ 1.718379] [c000000004a4be60] [c00000000105088c] cpuidle_enter+0x50/0x74
[ 1.718384] [c000000004a4bea0] [c0000000002ca85c] call_cpuidle+0x48/0xa0
[ 1.718389] [c000000004a4bec0] [c0000000002d3c80]
cpuidle_idle_call+0x160/0x2e0
[ 1.718395] [c000000004a4bf10] [c0000000002d3f48] do_idle+0x148/0x1f0
[ 1.718400] [c000000004a4bf60] [c0000000002d43c8]
cpu_startup_entry+0x4c/0x50
[ 1.718405] [c000000004a4bf90] [c00000000006371c]
start_secondary+0x27c/0x28c
[ 1.718411] [c000000004a4bfe0] [c00000000000e258]
start_secondary_prolog+0x10/0x14
[ 1.718415] Code: 60000000 3d220132 8929db48 2c090000 4082ff64
3c62ffd6 39200001 3d420132 3863d398 992adb48 4bd730f1 60000000
<0fe00000> 60000000 4bffff40 60000000
[ 1.718430] irq event stamp: 0
[ 1.718432] hardirqs last enabled at (0): [<0000000000000000>] 0x0
[ 1.718436] hardirqs last disabled at (0): [<c00000000022b6ac>]
copy_process+0xb24/0x1dec
[ 1.718442] softirqs last enabled at (0): [<c00000000022b6ac>]
copy_process+0xb24/0x1dec
[ 1.718447] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 1.718450] ---[ end trace 0000000000000000 ]---
I am reporting all three warnings in one report, as its flagging
inconsistencies around IRQ enable/disable transitions.
If you happen to fix this, please add below tag.
Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Regards,
Venkat.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [next20260529]powerpc/pseries: multiple WARNs: RCU not watching for tracepoint and lockdep_hardirq_context() during boot and cpuidle (Power11)
2026-06-01 13:27 [next20260529]powerpc/pseries: multiple WARNs: RCU not watching for tracepoint and lockdep_hardirq_context() during boot and cpuidle (Power11) Venkat Rao Bagalkote
@ 2026-06-02 15:24 ` Shrikanth Hegde
2026-06-02 15:53 ` Mukesh Kumar Chaurasiya
0 siblings, 1 reply; 3+ messages in thread
From: Shrikanth Hegde @ 2026-06-02 15:24 UTC (permalink / raw)
To: Venkat Rao Bagalkote, Mukesh Kumar Chaurasiya (IBM),
Madhavan Srinivasan, Peter Zijlstra
Cc: LKML, linuxppc-dev, Paul E. McKenney, Srikar Dronamraju,
Ingo Molnar
Hi Venkat, Thanks for the report.
On 6/1/26 6:57 PM, Venkat Rao Bagalkote wrote:
> Greetings!!!
>
>
> I am observing multiple reproducible WARN_ONs related to RCU and lockdep
> IRQ state tracking on a Power11 pSeries system when running on latest
> linux-next kernel.
>
>
> Environment:
> Architecture: ppc64le (Power11, pSeries LPAR)
> Kernel: 7.1.0-rc5-next-20260529
> Config: PREEMPT(lazy)
> CONFIG_LOCKDEP=y
> CONFIG_PROVE_LOCKING=y
>
>
> Warning1:
>
> [ 0.008277] ------------[ cut here ]------------
> [ 0.008285] RCU not watching for tracepoint
> [ 0.008294] WARNING: ./include/trace/events/preemptirq.h:36 at
> trace_hardirqs_off+0x16c/0x1a0, CPU#1: swapper/1/0
> [ 0.008306] Modules linked in:
> [ 0.008316] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 7.1.0-
> rc5-next-20260529 #1 PREEMPT(lazy)
> [ 0.008322] Hardware name: IBM,9080-HEX Power11 (architected)
> 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
> [ 0.008327] NIP: c0000000004bb2a8 LR: c0000000004bb2a4 CTR:
> 0000000000000000
> [ 0.008331] REGS: c0000000049cb690 TRAP: 0700 Not tainted (7.1.0-
> rc5-next-20260529)
> [ 0.008336] MSR: 8000000000021033 <SF,ME,IR,DR,RI,LE> CR: 44000208
> XER: 00000005
> [ 0.008348] CFAR: c00000000022e9d4 IRQMASK: 3
> [ 0.008348] GPR00: c0000000004bb2a4 c0000000049cb950 c000000001ccf100
> 000000000000001f
> [ 0.008348] GPR04: 3fffffffffff7fff c0000000049cb740 c0000000049cb738
> 0000000000000000
> [ 0.008348] GPR08: c0000000029d1230 0000000000000001 c0000000049e8000
> 0000000000000003
> [ 0.008348] GPR12: c000000002d514e0 c000000effffeb00 0000000000000000
> 0000000000000000
> [ 0.008348] GPR16: 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000
> [ 0.008348] GPR20: 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000
> [ 0.008348] GPR24: 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000
> [ 0.008348] GPR28: 0000000000000000 0000000000000001 c000000002414988
> c00000000005be40
> [ 0.008403] NIP [c0000000004bb2a8] trace_hardirqs_off+0x16c/0x1a0
> [ 0.008408] LR [c0000000004bb2a4] trace_hardirqs_off+0x168/0x1a0
> [ 0.008413] Call Trace:
> [ 0.008416] [c0000000049cb950] [c0000000004bb2a4]
> trace_hardirqs_off+0x168/0x1a0 (unreliable)
> [ 0.008423] [c0000000049cb9d0] [c00000000005be40]
> arch_interrupt_enter_prepare+0xa0/0x19c
> [ 0.008430] [c0000000049cba00] [c00000000005bf78]
> doorbell_exception+0x3c/0x4c4
> [ 0.008436] [c0000000049cbaa0] [c00000000000a2fc]
> doorbell_super_common_virt+0x28c/0x290
> [ 0.008443] ---- interrupt: a00 at plpar_hcall_norets_notrace+0x18/0x2c
> [ 0.008449] NIP: c0000000001b4fc8 LR: c0000000001bcea0 CTR:
> 0000000000000000
> [ 0.008453] REGS: c0000000049cbad0 TRAP: 0a00 Not tainted (7.1.0-
> rc5-next-20260529)
> [ 0.008457] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR:
> 24000008 XER: 00000000
> [ 0.008469] CFAR: 0000000000000000 IRQMASK: 0
> [ 0.008469] GPR00: 0000000000000000 c0000000049cbd90 c000000001ccf100
> 0000000000000000
> [ 0.008469] GPR04: 0000000000000000 8004000038407c10 0000000000000000
> 0000000000000003
> [ 0.008469] GPR08: 0000000000000001 0000000000000000 0000000000000090
> 0000000000000001
> [ 0.008469] GPR12: 8004000038407c00 c000000effffeb00 0000000000000000
> 000000002ef01820
> [ 0.008469] GPR16: 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000
> [ 0.008469] GPR20: 0000000000000000 0000000000000000 0000000000000000
> 0000000000000001
> [ 0.008469] GPR24: 0000000000000001 000000000000dedc c000000003086150
> 0000000000000001
> [ 0.008469] GPR28: c0000000049e8000 c000000002241548 c000000002241550
> c000000002241548
> [ 0.008523] NIP [c0000000001b4fc8] plpar_hcall_norets_notrace+0x18/0x2c
> [ 0.008528] LR [c0000000001bcea0] pseries_lpar_idle.part.0+0x74/0x160
> [ 0.008533] ---- interrupt: a00
> [ 0.008536] [c0000000049cbd90] [c0000000049cbe30] 0xc0000000049cbe30
> (unreliable)
> [ 0.008544] [c0000000049cbe10] [c000000000022c5c]
> arch_cpu_idle+0x4c/0x120
> [ 0.008551] [c0000000049cbe30] [c0000000015afe70]
> default_idle_call+0x154/0x454
> [ 0.008558] [c0000000049cbec0] [c0000000002d3dfc]
> cpuidle_idle_call+0x2dc/0x2e0
> [ 0.008565] [c0000000049cbf10] [c0000000002d3f48] do_idle+0x148/0x1f0
> [ 0.008571] [c0000000049cbf60] [c0000000002d43c8]
> cpu_startup_entry+0x4c/0x50
> [ 0.008578] [c0000000049cbf90] [c00000000006371c]
> start_secondary+0x27c/0x28c
> [ 0.008585] [c0000000049cbfe0] [c00000000000e258]
> start_secondary_prolog+0x10/0x14
> [ 0.008590] Code: 4bfffcc4 60000000 3d220132 8929db46 2c090000
> 4082ff94 3c62ffd6 3d220132 3863d398 9ba9db46 4bd73655 60000000
> <0fe00000> 60000000 4bffff74 60000000
> [ 0.008611] irq event stamp: 20
> [ 0.008614] hardirqs last enabled at (19): [<c0000000002d3dfc>]
> cpuidle_idle_call+0x2dc/0x2e0
> [ 0.008620] hardirqs last disabled at (20): [<c00000000005be40>]
> arch_interrupt_enter_prepare+0xa0/0x19c
> [ 0.008625] softirqs last enabled at (0): [<c00000000022b6ac>]
> copy_process+0xb24/0x1dec
> [ 0.008632] softirqs last disabled at (0): [<0000000000000000>] 0x0
> [ 0.008637] ---[ end trace 0000000000000000 ]---
>
Equivalent to trace_hardirqs_off is done by irqentry_enter.
So it is not essential in arch_interrupt_enter_prepare.
irqentry_enter
lockdep_hardirqs_off(CALLER_ADDR0);
trace_hardirqs_off_finish();
For reference:
void trace_hardirqs_off(void)
{
lockdep_hardirqs_off(CALLER_ADDR0);
if (!this_cpu_read(tracing_irq_cpu)) {
this_cpu_write(tracing_irq_cpu, 1);
tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
trace(irq_disable, TP_ARGS(CALLER_ADDR0, CALLER_ADDR1));
}
}
void trace_hardirqs_off_finish(void)
{
if (!this_cpu_read(tracing_irq_cpu)) {
this_cpu_write(tracing_irq_cpu, 1);
tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
trace(irq_disable, TP_ARGS(CALLER_ADDR0, CALLER_ADDR1));
}
}
>
> Warning2:
>
> [ 0.010098] ------------[ cut here ]------------
> [ 0.010103] DEBUG_LOCKS_WARN_ON(lockdep_hardirq_context())
> [ 0.010107] WARNING: kernel/locking/lockdep.c:4406 at
> lockdep_hardirqs_on_prepare+0x22c/0x2d4, CPU#0: swapper/0/1
> [ 0.010116] Modules linked in:
> [ 0.010120] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W
> 7.1.0-rc5-next-20260529 #1 PREEMPT(lazy)
> [ 0.010125] Tainted: [W]=WARN
> [ 0.010127] Hardware name: IBM,9080-HEX Power11 (architected)
> 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
> [ 0.010131] NIP: c00000000031549c LR: c000000000315498 CTR:
> 0000000000000000
> [ 0.010135] REGS: c0000000045bf100 TRAP: 0700 Tainted: G W
> (7.1.0-rc5-next-20260529)
> [ 0.010139] MSR: 8000000002021033 <SF,VEC,ME,IR,DR,RI,LE> CR:
> 44044228 XER: 00000005
> [ 0.010147] CFAR: c00000000022e9d4 IRQMASK: 3
> [ 0.010147] GPR00: c000000000315498 c0000000045bf3c0 c000000001ccf100
> 000000000000002e
> [ 0.010147] GPR04: 3fffffffffff7fff c0000000045bf1b0 c0000000045bf1a8
> 0000000000000000
> [ 0.010147] GPR08: c0000000029d1230 0000000000010002 c0000000048b2b00
> 0000000000000003
> [ 0.010147] GPR12: c000000002d514e0 c000000003ea1000 c000000000011ae4
> 0000000000000000
> [ 0.010147] GPR16: 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000
> [ 0.010147] GPR20: 0000000000000000 0000000000000004 c000000000272684
> c0000000029bb0c0
> [ 0.010147] GPR24: 0000000ebc171000 c000000ebeb63850 c000000003084d00
> c00000000308b2d0
> [ 0.010147] GPR28: c00000000002a488 0000000000000001 0000000000000000
> c000000002246e08
> [ 0.010188] NIP [c00000000031549c]
> lockdep_hardirqs_on_prepare+0x22c/0x2d4
> [ 0.010192] LR [c000000000315498]
> lockdep_hardirqs_on_prepare+0x228/0x2d4
> [ 0.010196] Call Trace:
> [ 0.010198] [c0000000045bf3c0] [c000000000315498]
> lockdep_hardirqs_on_prepare+0x228/0x2d4 (unreliable)
> [ 0.010204] [c0000000045bf430] [c0000000004bb778]
> trace_hardirqs_on+0xec/0x1b0
> [ 0.010209] [c0000000045bf4b0] [c0000000015ad574]
> irqentry_exit+0x58c/0xe1c
> [ 0.010213] [c0000000045bf540] [c00000000002a488]
> timer_interrupt+0x210/0x564
> [ 0.010219] [c0000000045bf5f0] [c00000000003b960]
> __replay_soft_interrupts+0x14c/0x374
> [ 0.010224] [c0000000045bf7d0] [c00000000003bd74]
> arch_local_irq_restore.part.0+0x1ec/0x224
> [ 0.010230] [c0000000045bf810] [c0000000015c17d4]
> _raw_spin_unlock_irqrestore+0x54/0xac
> [ 0.010235] [c0000000045bf840] [c0000000002cdd54]
> set_user_nice+0x110/0x220
> [ 0.010240] [c0000000045bf8e0] [c000000000266a94]
> create_worker+0x13c/0x310
> [ 0.010245] [c0000000045bf9a0] [c0000000002726f4]
> workqueue_prepare_cpu+0x70/0xe4
> [ 0.010251] [c0000000045bf9e0] [c000000000232604]
> cpuhp_invoke_callback+0x1e8/0x3c0
> [ 0.010256] [c0000000045bfa50] [c000000000232924]
> __cpuhp_invoke_callback_range+0x148/0x230
> [ 0.010261] [c0000000045bfaf0] [c000000000234f68] _cpu_up+0x19c/0x3cc
> [ 0.010265] [c0000000045bfbb0] [c00000000023533c] cpu_up+0x1a4/0x1f4
> [ 0.010269] [c0000000045bfc40] [c00000000203d1f4]
> bringup_nonboot_cpus+0xbc/0x128
> [ 0.010275] [c0000000045bfca0] [c00000000204b98c] smp_init+0x44/0xd0
> [ 0.010279] [c0000000045bfd00] [c000000002006d4c]
> kernel_init_freeable+0x23c/0x3b0
> [ 0.010284] [c0000000045bfdc0] [c000000000011b0c] kernel_init+0x30/0x274
> [ 0.010288] [c0000000045bfe30] [c00000000000debc]
> ret_from_kernel_user_thread+0x14/0x1c
> [ 0.010292] ---- interrupt: 0 at 0x0
> [ 0.010296] Code: 4182ff74 3d22013c 3929c1d4 81290000 2c090000
> 4082ff60 3c82ffda 3c62ffd9 3884f998 38634590 4bf19461 60000000
> <0fe00000> 4bffff40 60000000 60000000
> [ 0.010310] irq event stamp: 7440
> [ 0.010312] hardirqs last enabled at (7439): [<c0000000015c1824>]
> _raw_spin_unlock_irqrestore+0xa4/0xac
> [ 0.010317] hardirqs last disabled at (7440): [<c00000000003bc30>]
> arch_local_irq_restore.part.0+0xa8/0x224
> [ 0.010323] softirqs last enabled at (0): [<c00000000022b6ac>]
> copy_process+0xb24/0x1dec
> [ 0.010328] softirqs last disabled at (0): [<0000000000000000>] 0x0
> [ 0.010331] ---[ end trace 0000000000000000 ]---
>
>
This should be fixed by the diff where interrupts are disabled
when going to irqentry_exit.
>
> Warning3:
>
> [ 1.718239] ------------[ cut here ]------------
> [ 1.718247] RCU not watching for tracepoint
> [ 1.718255] WARNING: ./include/trace/events/preemptirq.h:40 at
> trace_hardirqs_on+0x180/0x1b0, CPU#19: swapper/19/0
> [ 1.718266] Modules linked in: ibmvscsi ibmveth scsi_transport_srp
> pseries_wdt
> [ 1.718275] CPU: 19 UID: 0 PID: 0 Comm: swapper/19 Tainted: G W
> 7.1.0-rc5-next-20260529 #1 PREEMPT(lazy)
> [ 1.718280] Tainted: [W]=WARN
> [ 1.718283] Hardware name: IBM,9080-HEX Power11 (architected)
> 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
> [ 1.718287] NIP: c0000000004bb80c LR: c0000000004bb808 CTR:
> 0000000000000000
> [ 1.718290] REGS: c000000004a4b9e0 TRAP: 0700 Tainted: G W
> (7.1.0-rc5-next-20260529)
> [ 1.718294] MSR: 8000000002823033 <SF,VEC,VSX,FP,ME,IR,DR,RI,LE> CR:
> 44000208 XER: 00000005
> [ 1.718305] CFAR: c00000000022e9d4 IRQMASK: 3
> [ 1.718305] GPR00: c0000000004bb808 c000000004a4bca0 c000000001ccf100
> 000000000000001f
> [ 1.718305] GPR04: 3fffffffffff7fff c000000004a4ba90 c000000004a4ba88
> 0000000ebe5e2000
> [ 1.718305] GPR08: 0000000000000027 0000000000000002 c000000004a62b00
> 0000000000000003
> [ 1.718305] GPR12: c000000002d514e0 c000000effff1300 0000000000000000
> 000000002ef01a60
> [ 1.718305] GPR16: 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000
> [ 1.718305] GPR20: 0000000000000000 0000000000000000 0000000000000000
> 00000000666a3c88
> [ 1.718305] GPR24: c00000000105088c 000000000000dedc c000000003084d00
> 0000000000000000
> [ 1.718305] GPR28: c000000ec09fe440 0000000000000001 c000000002414988
> c00000000003bca8
> [ 1.718347] NIP [c0000000004bb80c] trace_hardirqs_on+0x180/0x1b0
> [ 1.718351] LR [c0000000004bb808] trace_hardirqs_on+0x17c/0x1b0
> [ 1.718355] Call Trace:
> [ 1.718357] [c000000004a4bca0] [c0000000004bb808]
> trace_hardirqs_on+0x17c/0x1b0 (unreliable)
> [ 1.718362] [c000000004a4bd20] [c00000000003bca8]
> arch_local_irq_restore.part.0+0x120/0x224
> [ 1.718369] [c000000004a4bd60] [c0000000015b065c] snooze_loop+0xa0/0x270
> [ 1.718374] [c000000004a4bda0] [c0000000015af06c]
> cpuidle_enter_state+0x110/0x8fc
> [ 1.718379] [c000000004a4be60] [c00000000105088c]
> cpuidle_enter+0x50/0x74
> [ 1.718384] [c000000004a4bea0] [c0000000002ca85c] call_cpuidle+0x48/0xa0
> [ 1.718389] [c000000004a4bec0] [c0000000002d3c80]
> cpuidle_idle_call+0x160/0x2e0
> [ 1.718395] [c000000004a4bf10] [c0000000002d3f48] do_idle+0x148/0x1f0
> [ 1.718400] [c000000004a4bf60] [c0000000002d43c8]
> cpu_startup_entry+0x4c/0x50
> [ 1.718405] [c000000004a4bf90] [c00000000006371c]
> start_secondary+0x27c/0x28c
> [ 1.718411] [c000000004a4bfe0] [c00000000000e258]
> start_secondary_prolog+0x10/0x14
> [ 1.718415] Code: 60000000 3d220132 8929db48 2c090000 4082ff64
> 3c62ffd6 39200001 3d420132 3863d398 992adb48 4bd730f1 60000000
> <0fe00000> 60000000 4bffff40 60000000
> [ 1.718430] irq event stamp: 0
> [ 1.718432] hardirqs last enabled at (0): [<0000000000000000>] 0x0
> [ 1.718436] hardirqs last disabled at (0): [<c00000000022b6ac>]
> copy_process+0xb24/0x1dec
> [ 1.718442] softirqs last enabled at (0): [<c00000000022b6ac>]
> copy_process+0xb24/0x1dec
> [ 1.718447] softirqs last disabled at (0): [<0000000000000000>] 0x0
> [ 1.718450] ---[ end trace 0000000000000000 ]---
>
>
Idle loop is expected to use the variant without the traces.
raw_* is being used in the diff.
>
> I am reporting all three warnings in one report, as its flagging
> inconsistencies around IRQ enable/disable transitions.
>
>
> If you happen to fix this, please add below tag.
>
>
> Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
>
>
>
> Regards,
>
> Venkat.
>
>
Can you try the below diff and check if all three gets solved?
diff --git a/arch/powerpc/include/asm/entry-common.h b/arch/powerpc/include/asm/entry-common.h
index de5601282755..a7f30875d14a 100644
--- a/arch/powerpc/include/asm/entry-common.h
+++ b/arch/powerpc/include/asm/entry-common.h
@@ -210,9 +210,6 @@ static inline void arch_interrupt_enter_prepare(struct pt_regs *regs)
/* Enable MSR[RI] early, to support kernel SLB and hash faults */
#endif
- if (!regs_irqs_disabled(regs))
- trace_hardirqs_off();
-
if (user_mode(regs)) {
kuap_lock();
account_cpu_user_entry();
@@ -253,16 +250,17 @@ static inline void arch_interrupt_enter_prepare(struct pt_regs *regs)
static inline void arch_interrupt_exit_prepare(struct pt_regs *regs)
{
if (user_mode(regs)) {
- BUG_ON(regs_is_unrecoverable(regs));
- BUG_ON(regs_irqs_disabled(regs));
+ WARN_ON(regs_is_unrecoverable(regs));
+ WARN_ON(regs_irqs_disabled(regs));
/*
* We don't need to restore AMR on the way back to userspace for KUAP.
* AMR can only have been unlocked if we interrupted the kernel.
*/
kuap_assert_locked();
-
- local_irq_disable();
}
+
+ /* irqentry_exit expects to be called with interrupts disabled */
+ local_irq_disable();
}
static inline void arch_interrupt_async_enter_prepare(struct pt_regs *regs)
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
index b89e7111e7b8..a0d18deb7119 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++ b/drivers/cpuidle/cpuidle-powernv.c
@@ -73,7 +73,7 @@ static int snooze_loop(struct cpuidle_device *dev,
set_thread_flag(TIF_POLLING_NRFLAG);
- local_irq_enable();
+ raw_local_irq_enable();
snooze_exit_time = get_tb() + get_snooze_timeout(dev, drv, index);
dev->poll_time_limit = false;
@@ -100,7 +100,7 @@ static int snooze_loop(struct cpuidle_device *dev,
if (!dev->poll_time_limit)
clear_thread_flag(TIF_POLLING_NRFLAG);
- local_irq_disable();
+ raw_local_irq_disable();
return index;
}
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [next20260529]powerpc/pseries: multiple WARNs: RCU not watching for tracepoint and lockdep_hardirq_context() during boot and cpuidle (Power11)
2026-06-02 15:24 ` Shrikanth Hegde
@ 2026-06-02 15:53 ` Mukesh Kumar Chaurasiya
0 siblings, 0 replies; 3+ messages in thread
From: Mukesh Kumar Chaurasiya @ 2026-06-02 15:53 UTC (permalink / raw)
To: Shrikanth Hegde
Cc: Venkat Rao Bagalkote, Madhavan Srinivasan, Peter Zijlstra, LKML,
linuxppc-dev, Paul E. McKenney, Srikar Dronamraju, Ingo Molnar
On Tue, Jun 02, 2026 at 08:54:54PM +0530, Shrikanth Hegde wrote:
> Hi Venkat, Thanks for the report.
>
> On 6/1/26 6:57 PM, Venkat Rao Bagalkote wrote:
> > Greetings!!!
> >
> >
> > I am observing multiple reproducible WARN_ONs related to RCU and lockdep
> > IRQ state tracking on a Power11 pSeries system when running on latest
> > linux-next kernel.
> >
> >
> > Environment:
> > Architecture: ppc64le (Power11, pSeries LPAR)
> > Kernel: 7.1.0-rc5-next-20260529
> > Config: PREEMPT(lazy)
> > CONFIG_LOCKDEP=y
> > CONFIG_PROVE_LOCKING=y
> >
> >
> > Warning1:
> >
> > [ 0.008277] ------------[ cut here ]------------
> > [ 0.008285] RCU not watching for tracepoint
> > [ 0.008294] WARNING: ./include/trace/events/preemptirq.h:36 at
> > trace_hardirqs_off+0x16c/0x1a0, CPU#1: swapper/1/0
> > [ 0.008306] Modules linked in:
> > [ 0.008316] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 7.1.0-
> > rc5-next-20260529 #1 PREEMPT(lazy)
> > [ 0.008322] Hardware name: IBM,9080-HEX Power11 (architected)
> > 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
> > [ 0.008327] NIP: c0000000004bb2a8 LR: c0000000004bb2a4 CTR:
> > 0000000000000000
> > [ 0.008331] REGS: c0000000049cb690 TRAP: 0700 Not tainted (7.1.0-
> > rc5-next-20260529)
> > [ 0.008336] MSR: 8000000000021033 <SF,ME,IR,DR,RI,LE> CR: 44000208
> > XER: 00000005
> > [ 0.008348] CFAR: c00000000022e9d4 IRQMASK: 3
> > [ 0.008348] GPR00: c0000000004bb2a4 c0000000049cb950 c000000001ccf100
> > 000000000000001f
> > [ 0.008348] GPR04: 3fffffffffff7fff c0000000049cb740 c0000000049cb738
> > 0000000000000000
> > [ 0.008348] GPR08: c0000000029d1230 0000000000000001 c0000000049e8000
> > 0000000000000003
> > [ 0.008348] GPR12: c000000002d514e0 c000000effffeb00 0000000000000000
> > 0000000000000000
> > [ 0.008348] GPR16: 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000
> > [ 0.008348] GPR20: 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000
> > [ 0.008348] GPR24: 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000
> > [ 0.008348] GPR28: 0000000000000000 0000000000000001 c000000002414988
> > c00000000005be40
> > [ 0.008403] NIP [c0000000004bb2a8] trace_hardirqs_off+0x16c/0x1a0
> > [ 0.008408] LR [c0000000004bb2a4] trace_hardirqs_off+0x168/0x1a0
> > [ 0.008413] Call Trace:
> > [ 0.008416] [c0000000049cb950] [c0000000004bb2a4]
> > trace_hardirqs_off+0x168/0x1a0 (unreliable)
> > [ 0.008423] [c0000000049cb9d0] [c00000000005be40]
> > arch_interrupt_enter_prepare+0xa0/0x19c
> > [ 0.008430] [c0000000049cba00] [c00000000005bf78]
> > doorbell_exception+0x3c/0x4c4
> > [ 0.008436] [c0000000049cbaa0] [c00000000000a2fc]
> > doorbell_super_common_virt+0x28c/0x290
> > [ 0.008443] ---- interrupt: a00 at plpar_hcall_norets_notrace+0x18/0x2c
> > [ 0.008449] NIP: c0000000001b4fc8 LR: c0000000001bcea0 CTR:
> > 0000000000000000
> > [ 0.008453] REGS: c0000000049cbad0 TRAP: 0a00 Not tainted (7.1.0-
> > rc5-next-20260529)
> > [ 0.008457] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR:
> > 24000008 XER: 00000000
> > [ 0.008469] CFAR: 0000000000000000 IRQMASK: 0
> > [ 0.008469] GPR00: 0000000000000000 c0000000049cbd90 c000000001ccf100
> > 0000000000000000
> > [ 0.008469] GPR04: 0000000000000000 8004000038407c10 0000000000000000
> > 0000000000000003
> > [ 0.008469] GPR08: 0000000000000001 0000000000000000 0000000000000090
> > 0000000000000001
> > [ 0.008469] GPR12: 8004000038407c00 c000000effffeb00 0000000000000000
> > 000000002ef01820
> > [ 0.008469] GPR16: 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000
> > [ 0.008469] GPR20: 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000001
> > [ 0.008469] GPR24: 0000000000000001 000000000000dedc c000000003086150
> > 0000000000000001
> > [ 0.008469] GPR28: c0000000049e8000 c000000002241548 c000000002241550
> > c000000002241548
> > [ 0.008523] NIP [c0000000001b4fc8] plpar_hcall_norets_notrace+0x18/0x2c
> > [ 0.008528] LR [c0000000001bcea0] pseries_lpar_idle.part.0+0x74/0x160
> > [ 0.008533] ---- interrupt: a00
> > [ 0.008536] [c0000000049cbd90] [c0000000049cbe30] 0xc0000000049cbe30
> > (unreliable)
> > [ 0.008544] [c0000000049cbe10] [c000000000022c5c]
> > arch_cpu_idle+0x4c/0x120
> > [ 0.008551] [c0000000049cbe30] [c0000000015afe70]
> > default_idle_call+0x154/0x454
> > [ 0.008558] [c0000000049cbec0] [c0000000002d3dfc]
> > cpuidle_idle_call+0x2dc/0x2e0
> > [ 0.008565] [c0000000049cbf10] [c0000000002d3f48] do_idle+0x148/0x1f0
> > [ 0.008571] [c0000000049cbf60] [c0000000002d43c8]
> > cpu_startup_entry+0x4c/0x50
> > [ 0.008578] [c0000000049cbf90] [c00000000006371c]
> > start_secondary+0x27c/0x28c
> > [ 0.008585] [c0000000049cbfe0] [c00000000000e258]
> > start_secondary_prolog+0x10/0x14
> > [ 0.008590] Code: 4bfffcc4 60000000 3d220132 8929db46 2c090000
> > 4082ff94 3c62ffd6 3d220132 3863d398 9ba9db46 4bd73655 60000000
> > <0fe00000> 60000000 4bffff74 60000000
> > [ 0.008611] irq event stamp: 20
> > [ 0.008614] hardirqs last enabled at (19): [<c0000000002d3dfc>]
> > cpuidle_idle_call+0x2dc/0x2e0
> > [ 0.008620] hardirqs last disabled at (20): [<c00000000005be40>]
> > arch_interrupt_enter_prepare+0xa0/0x19c
> > [ 0.008625] softirqs last enabled at (0): [<c00000000022b6ac>]
> > copy_process+0xb24/0x1dec
> > [ 0.008632] softirqs last disabled at (0): [<0000000000000000>] 0x0
> > [ 0.008637] ---[ end trace 0000000000000000 ]---
> >
>
> Equivalent to trace_hardirqs_off is done by irqentry_enter.
> So it is not essential in arch_interrupt_enter_prepare.
>
> irqentry_enter
> lockdep_hardirqs_off(CALLER_ADDR0);
> trace_hardirqs_off_finish();
>
>
> For reference:
> void trace_hardirqs_off(void)
> {
> lockdep_hardirqs_off(CALLER_ADDR0);
>
> if (!this_cpu_read(tracing_irq_cpu)) {
> this_cpu_write(tracing_irq_cpu, 1);
> tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
> trace(irq_disable, TP_ARGS(CALLER_ADDR0, CALLER_ADDR1));
> }
> }
>
> void trace_hardirqs_off_finish(void)
> {
> if (!this_cpu_read(tracing_irq_cpu)) {
> this_cpu_write(tracing_irq_cpu, 1);
> tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
> trace(irq_disable, TP_ARGS(CALLER_ADDR0, CALLER_ADDR1));
> }
>
> }
>
> >
> > Warning2:
> >
> > [ 0.010098] ------------[ cut here ]------------
> > [ 0.010103] DEBUG_LOCKS_WARN_ON(lockdep_hardirq_context())
> > [ 0.010107] WARNING: kernel/locking/lockdep.c:4406 at
> > lockdep_hardirqs_on_prepare+0x22c/0x2d4, CPU#0: swapper/0/1
> > [ 0.010116] Modules linked in:
> > [ 0.010120] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W
> > 7.1.0-rc5-next-20260529 #1 PREEMPT(lazy)
> > [ 0.010125] Tainted: [W]=WARN
> > [ 0.010127] Hardware name: IBM,9080-HEX Power11 (architected)
> > 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
> > [ 0.010131] NIP: c00000000031549c LR: c000000000315498 CTR:
> > 0000000000000000
> > [ 0.010135] REGS: c0000000045bf100 TRAP: 0700 Tainted: G W
> > (7.1.0-rc5-next-20260529)
> > [ 0.010139] MSR: 8000000002021033 <SF,VEC,ME,IR,DR,RI,LE> CR:
> > 44044228 XER: 00000005
> > [ 0.010147] CFAR: c00000000022e9d4 IRQMASK: 3
> > [ 0.010147] GPR00: c000000000315498 c0000000045bf3c0 c000000001ccf100
> > 000000000000002e
> > [ 0.010147] GPR04: 3fffffffffff7fff c0000000045bf1b0 c0000000045bf1a8
> > 0000000000000000
> > [ 0.010147] GPR08: c0000000029d1230 0000000000010002 c0000000048b2b00
> > 0000000000000003
> > [ 0.010147] GPR12: c000000002d514e0 c000000003ea1000 c000000000011ae4
> > 0000000000000000
> > [ 0.010147] GPR16: 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000
> > [ 0.010147] GPR20: 0000000000000000 0000000000000004 c000000000272684
> > c0000000029bb0c0
> > [ 0.010147] GPR24: 0000000ebc171000 c000000ebeb63850 c000000003084d00
> > c00000000308b2d0
> > [ 0.010147] GPR28: c00000000002a488 0000000000000001 0000000000000000
> > c000000002246e08
> > [ 0.010188] NIP [c00000000031549c]
> > lockdep_hardirqs_on_prepare+0x22c/0x2d4
> > [ 0.010192] LR [c000000000315498]
> > lockdep_hardirqs_on_prepare+0x228/0x2d4
> > [ 0.010196] Call Trace:
> > [ 0.010198] [c0000000045bf3c0] [c000000000315498]
> > lockdep_hardirqs_on_prepare+0x228/0x2d4 (unreliable)
> > [ 0.010204] [c0000000045bf430] [c0000000004bb778]
> > trace_hardirqs_on+0xec/0x1b0
> > [ 0.010209] [c0000000045bf4b0] [c0000000015ad574]
> > irqentry_exit+0x58c/0xe1c
> > [ 0.010213] [c0000000045bf540] [c00000000002a488]
> > timer_interrupt+0x210/0x564
> > [ 0.010219] [c0000000045bf5f0] [c00000000003b960]
> > __replay_soft_interrupts+0x14c/0x374
> > [ 0.010224] [c0000000045bf7d0] [c00000000003bd74]
> > arch_local_irq_restore.part.0+0x1ec/0x224
> > [ 0.010230] [c0000000045bf810] [c0000000015c17d4]
> > _raw_spin_unlock_irqrestore+0x54/0xac
> > [ 0.010235] [c0000000045bf840] [c0000000002cdd54]
> > set_user_nice+0x110/0x220
> > [ 0.010240] [c0000000045bf8e0] [c000000000266a94]
> > create_worker+0x13c/0x310
> > [ 0.010245] [c0000000045bf9a0] [c0000000002726f4]
> > workqueue_prepare_cpu+0x70/0xe4
> > [ 0.010251] [c0000000045bf9e0] [c000000000232604]
> > cpuhp_invoke_callback+0x1e8/0x3c0
> > [ 0.010256] [c0000000045bfa50] [c000000000232924]
> > __cpuhp_invoke_callback_range+0x148/0x230
> > [ 0.010261] [c0000000045bfaf0] [c000000000234f68] _cpu_up+0x19c/0x3cc
> > [ 0.010265] [c0000000045bfbb0] [c00000000023533c] cpu_up+0x1a4/0x1f4
> > [ 0.010269] [c0000000045bfc40] [c00000000203d1f4]
> > bringup_nonboot_cpus+0xbc/0x128
> > [ 0.010275] [c0000000045bfca0] [c00000000204b98c] smp_init+0x44/0xd0
> > [ 0.010279] [c0000000045bfd00] [c000000002006d4c]
> > kernel_init_freeable+0x23c/0x3b0
> > [ 0.010284] [c0000000045bfdc0] [c000000000011b0c] kernel_init+0x30/0x274
> > [ 0.010288] [c0000000045bfe30] [c00000000000debc]
> > ret_from_kernel_user_thread+0x14/0x1c
> > [ 0.010292] ---- interrupt: 0 at 0x0
> > [ 0.010296] Code: 4182ff74 3d22013c 3929c1d4 81290000 2c090000
> > 4082ff60 3c82ffda 3c62ffd9 3884f998 38634590 4bf19461 60000000
> > <0fe00000> 4bffff40 60000000 60000000
> > [ 0.010310] irq event stamp: 7440
> > [ 0.010312] hardirqs last enabled at (7439): [<c0000000015c1824>]
> > _raw_spin_unlock_irqrestore+0xa4/0xac
> > [ 0.010317] hardirqs last disabled at (7440): [<c00000000003bc30>]
> > arch_local_irq_restore.part.0+0xa8/0x224
> > [ 0.010323] softirqs last enabled at (0): [<c00000000022b6ac>]
> > copy_process+0xb24/0x1dec
> > [ 0.010328] softirqs last disabled at (0): [<0000000000000000>] 0x0
> > [ 0.010331] ---[ end trace 0000000000000000 ]---
> >
> >
>
> This should be fixed by the diff where interrupts are disabled
> when going to irqentry_exit.
>
> >
> > Warning3:
> >
> > [ 1.718239] ------------[ cut here ]------------
> > [ 1.718247] RCU not watching for tracepoint
> > [ 1.718255] WARNING: ./include/trace/events/preemptirq.h:40 at
> > trace_hardirqs_on+0x180/0x1b0, CPU#19: swapper/19/0
> > [ 1.718266] Modules linked in: ibmvscsi ibmveth scsi_transport_srp
> > pseries_wdt
> > [ 1.718275] CPU: 19 UID: 0 PID: 0 Comm: swapper/19 Tainted: G W
> > 7.1.0-rc5-next-20260529 #1 PREEMPT(lazy)
> > [ 1.718280] Tainted: [W]=WARN
> > [ 1.718283] Hardware name: IBM,9080-HEX Power11 (architected)
> > 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
> > [ 1.718287] NIP: c0000000004bb80c LR: c0000000004bb808 CTR:
> > 0000000000000000
> > [ 1.718290] REGS: c000000004a4b9e0 TRAP: 0700 Tainted: G W
> > (7.1.0-rc5-next-20260529)
> > [ 1.718294] MSR: 8000000002823033 <SF,VEC,VSX,FP,ME,IR,DR,RI,LE> CR:
> > 44000208 XER: 00000005
> > [ 1.718305] CFAR: c00000000022e9d4 IRQMASK: 3
> > [ 1.718305] GPR00: c0000000004bb808 c000000004a4bca0 c000000001ccf100
> > 000000000000001f
> > [ 1.718305] GPR04: 3fffffffffff7fff c000000004a4ba90 c000000004a4ba88
> > 0000000ebe5e2000
> > [ 1.718305] GPR08: 0000000000000027 0000000000000002 c000000004a62b00
> > 0000000000000003
> > [ 1.718305] GPR12: c000000002d514e0 c000000effff1300 0000000000000000
> > 000000002ef01a60
> > [ 1.718305] GPR16: 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000
> > [ 1.718305] GPR20: 0000000000000000 0000000000000000 0000000000000000
> > 00000000666a3c88
> > [ 1.718305] GPR24: c00000000105088c 000000000000dedc c000000003084d00
> > 0000000000000000
> > [ 1.718305] GPR28: c000000ec09fe440 0000000000000001 c000000002414988
> > c00000000003bca8
> > [ 1.718347] NIP [c0000000004bb80c] trace_hardirqs_on+0x180/0x1b0
> > [ 1.718351] LR [c0000000004bb808] trace_hardirqs_on+0x17c/0x1b0
> > [ 1.718355] Call Trace:
> > [ 1.718357] [c000000004a4bca0] [c0000000004bb808]
> > trace_hardirqs_on+0x17c/0x1b0 (unreliable)
> > [ 1.718362] [c000000004a4bd20] [c00000000003bca8]
> > arch_local_irq_restore.part.0+0x120/0x224
> > [ 1.718369] [c000000004a4bd60] [c0000000015b065c] snooze_loop+0xa0/0x270
> > [ 1.718374] [c000000004a4bda0] [c0000000015af06c]
> > cpuidle_enter_state+0x110/0x8fc
> > [ 1.718379] [c000000004a4be60] [c00000000105088c]
> > cpuidle_enter+0x50/0x74
> > [ 1.718384] [c000000004a4bea0] [c0000000002ca85c] call_cpuidle+0x48/0xa0
> > [ 1.718389] [c000000004a4bec0] [c0000000002d3c80]
> > cpuidle_idle_call+0x160/0x2e0
> > [ 1.718395] [c000000004a4bf10] [c0000000002d3f48] do_idle+0x148/0x1f0
> > [ 1.718400] [c000000004a4bf60] [c0000000002d43c8]
> > cpu_startup_entry+0x4c/0x50
> > [ 1.718405] [c000000004a4bf90] [c00000000006371c]
> > start_secondary+0x27c/0x28c
> > [ 1.718411] [c000000004a4bfe0] [c00000000000e258]
> > start_secondary_prolog+0x10/0x14
> > [ 1.718415] Code: 60000000 3d220132 8929db48 2c090000 4082ff64
> > 3c62ffd6 39200001 3d420132 3863d398 992adb48 4bd730f1 60000000
> > <0fe00000> 60000000 4bffff40 60000000
> > [ 1.718430] irq event stamp: 0
> > [ 1.718432] hardirqs last enabled at (0): [<0000000000000000>] 0x0
> > [ 1.718436] hardirqs last disabled at (0): [<c00000000022b6ac>]
> > copy_process+0xb24/0x1dec
> > [ 1.718442] softirqs last enabled at (0): [<c00000000022b6ac>]
> > copy_process+0xb24/0x1dec
> > [ 1.718447] softirqs last disabled at (0): [<0000000000000000>] 0x0
> > [ 1.718450] ---[ end trace 0000000000000000 ]---
> >
> >
>
> Idle loop is expected to use the variant without the traces.
> raw_* is being used in the diff.
>
> >
> > I am reporting all three warnings in one report, as its flagging
> > inconsistencies around IRQ enable/disable transitions.
> >
> >
> > If you happen to fix this, please add below tag.
> >
> >
> > Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
> >
> >
> >
> > Regards,
> >
> > Venkat.
> >
> >
>
>
> Can you try the below diff and check if all three gets solved?
>
>
> diff --git a/arch/powerpc/include/asm/entry-common.h b/arch/powerpc/include/asm/entry-common.h
> index de5601282755..a7f30875d14a 100644
> --- a/arch/powerpc/include/asm/entry-common.h
> +++ b/arch/powerpc/include/asm/entry-common.h
> @@ -210,9 +210,6 @@ static inline void arch_interrupt_enter_prepare(struct pt_regs *regs)
> /* Enable MSR[RI] early, to support kernel SLB and hash faults */
> #endif
> - if (!regs_irqs_disabled(regs))
> - trace_hardirqs_off();
> -
> if (user_mode(regs)) {
> kuap_lock();
> account_cpu_user_entry();
> @@ -253,16 +250,17 @@ static inline void arch_interrupt_enter_prepare(struct pt_regs *regs)
> static inline void arch_interrupt_exit_prepare(struct pt_regs *regs)
> {
> if (user_mode(regs)) {
> - BUG_ON(regs_is_unrecoverable(regs));
> - BUG_ON(regs_irqs_disabled(regs));
> + WARN_ON(regs_is_unrecoverable(regs));
> + WARN_ON(regs_irqs_disabled(regs));
> /*
> * We don't need to restore AMR on the way back to userspace for KUAP.
> * AMR can only have been unlocked if we interrupted the kernel.
> */
> kuap_assert_locked();
> -
> - local_irq_disable();
> }
> +
> + /* irqentry_exit expects to be called with interrupts disabled */
> + local_irq_disable();
> }
Hey,
I tried this, it didn't resolve the issue. It's something else I guess.
> static inline void arch_interrupt_async_enter_prepare(struct pt_regs *regs)
> diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
> index b89e7111e7b8..a0d18deb7119 100644
> --- a/drivers/cpuidle/cpuidle-powernv.c
> +++ b/drivers/cpuidle/cpuidle-powernv.c
> @@ -73,7 +73,7 @@ static int snooze_loop(struct cpuidle_device *dev,
> set_thread_flag(TIF_POLLING_NRFLAG);
> - local_irq_enable();
> + raw_local_irq_enable();
> snooze_exit_time = get_tb() + get_snooze_timeout(dev, drv, index);
> dev->poll_time_limit = false;
> @@ -100,7 +100,7 @@ static int snooze_loop(struct cpuidle_device *dev,
> if (!dev->poll_time_limit)
> clear_thread_flag(TIF_POLLING_NRFLAG);
> - local_irq_disable();
> + raw_local_irq_disable();
> return index;
> }
>
>
I tried this diff. Doesn't seems to solve the issue.
[ 0.010278] ------------[ cut here ]------------
[ 0.010285] DEBUG_LOCKS_WARN_ON(lockdep_hardirq_context())
[ 0.010300] WARNING: kernel/locking/lockdep.c:4406 at lockdep_hardirqs_on_prepare+0x22c/0x2e0, CPU#184: swapper/184/0
[ 0.010316] Modules linked in:
[ 0.010332] CPU: 184 UID: 0 PID: 0 Comm: swapper/184 Not tainted 7.1.0-rc6-next-20260601-dirty #2 PREEMPT(lazy)
[ 0.010340] Hardware name: IBM,9043-MRU Power11 (architected) 0x820200 0xf000007 of:IBM,FW1110.11 (RF1110_119) hv:phyp pSeries
[ 0.010347] NIP: c00000000036acac LR: c00000000036aca8 CTR: 0000000000000000
[ 0.010353] REGS: c00000000417b4a0 TRAP: 0700 Not tainted (7.1.0-rc6-next-20260601-dirty)
[ 0.010359] MSR: 8000000002021033 <SF,VEC,ME,IR,DR,RI,LE> CR: 44004228 XER: 00000005
[ 0.010377] CFAR: c000000000261518 IRQMASK: 1
GPR00: c00000000036aca8 c00000000417b760 c00000000251a700 000000000000002e
GPR04: 3fffffffffff7fff 0000000000000001 c00000000417b558 0000000000000000
GPR08: c000000003d2cce8 0000000000010002 c000000003c91700 c00000000417b560
GPR12: c000007fd383ff90 c000000004f80000 0000000000000000 0000007ff9e90000
GPR16: 0000007ff9e70000 0000000000000000 0000007ff9e90114 0000000000000000
GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR24: 0000000048000054 c0000000032c0680 c000000004fe0000 c00000000002a4c4
GPR28: c0000000041e3d80 c0000000041ea340 c0000000032c0580 c0000000032c6e08
[ 0.010447] NIP [c00000000036acac] lockdep_hardirqs_on_prepare+0x22c/0x2e0
[ 0.010453] LR [c00000000036aca8] lockdep_hardirqs_on_prepare+0x228/0x2e0
[ 0.010464] Call Trace:
[ 0.010470] [c00000000417b760] [c00000000036aca8] lockdep_hardirqs_on_prepare+0x228/0x2e0 (unreliable)
[ 0.010482] [c00000000417b7e0] [c0000000005269e0] trace_hardirqs_on+0xf0/0x1b0
[ 0.010495] [c00000000417b860] [c000000001c5f474] irqentry_exit+0x544/0x1010
[ 0.010506] [c00000000417b8f0] [c00000000002a4c4] timer_interrupt+0x224/0x580
[ 0.010514] [c00000000417b9a0] [c00000000003d840] __replay_soft_interrupts+0x150/0x3a0
[ 0.010522] [c00000000417bb80] [c00000000003dc24] arch_local_irq_restore.part.0+0x194/0x200
[ 0.010529] [c00000000417bbc0] [c000000000187520] patch_mem+0x360/0x520
[ 0.010541] [c00000000417bc50] [c000000000060ba4] arch_jump_label_transform+0x64/0x78
[ 0.010551] [c00000000417bc70] [c0000000007043f0] __jump_label_update+0x70/0x140
[ 0.010558] [c00000000417bcf0] [c000000000704d70] static_key_enable_cpuslocked+0xd0/0x120
[ 0.010566] [c00000000417bd60] [c000000000704dec] static_key_enable+0x2c/0x50
[ 0.010573] [c00000000417bd90] [c0000000030764a8] security_add_hooks+0x74/0xb8
[ 0.010586] [c00000000417be10] [c00000000307542c] capability_init+0x30/0x48
[ 0.010598] [c00000000417be30] [c000000003075b24] lsm_init_single+0x74/0xb4
[ 0.010607] [c00000000417bea0] [c0000000030769fc] security_init+0x478/0x4a8
[ 0.010614] [c00000000417bf30] [c00000000300e838] start_kernel+0x5f0/0x670
[ 0.010623] [c00000000417bfe0] [c00000000000e998] start_here_common+0x1c/0x20
[ 0.010631] Code: 4182ff80 3d2201cd 3929fc44 81290000 2c090000 4082ff6c 3c82ffd3 3c62ffd2 3884cc60 38631590 4bef6775 60000000 <0fe00000> 4bffff4c 60000000 60000000
[ 0.010664] irq event stamp: 38250
[ 0.010672] hardirqs last enabled at (38249): [<c000000000187514>] patch_mem+0x354/0x520
[ 0.010682] hardirqs last disabled at (38250): [<c00000000003db34>] arch_local_irq_restore.part.0+0xa4/0x200
[ 0.010691] softirqs last enabled at (0): [<0000000000000000>] 0x0
[ 0.010700] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 0.010705] ---[ end trace 0000000000000000 ]---
[...]
[ 1.002143] ------------[ cut here ]------------
[ 1.002153] RCU not watching for tracepoint
[ 1.002162] SED: plpks not available
[ 1.002165] WARNING: ./include/trace/events/preemptirq.h:36 at trace_hardirqs_off+0x168/0x190, CPU#177: swapper/177/0
[ 1.002177] Modules linked in: aes_gcm_p10_crypto crypto_simd cryptd
[ 1.002190] CPU: 177 UID: 0 PID: 0 Comm: swapper/177 Tainted: G W 7.1.0-rc6-next-20260601-dirty #2 PREEMPT(lazy)
[ 1.002202] Tainted: [W]=WARN
[ 1.002206] Hardware name: IBM,9043-MRU Power11 (architected) 0x820200 0xf000007 of:IBM,FW1110.11 (RF1110_119) hv:phyp pSeries
[ 1.002215] NIP: c000000000526f98 LR: c000000000526f94 CTR: 0000000000000000
[ 1.002224] REGS: c00000001249f9b0 TRAP: 0700 Tainted: G W (7.1.0-rc6-next-20260601-dirty)
[ 1.002234] MSR: 8000000002021033 <SF,VEC,ME,IR,DR,RI,LE> CR: 44000288 XER: 00000005
[ 1.002244] CFAR: c000000000261518 IRQMASK: 3
GPR00: c000000000526f94 c00000001249fc70 c00000000251a700 000000000000001f
GPR04: 3fffffffffff7fff 0000000000000001 c00000001249fa68 0000000000000001
GPR08: c000000003d2cce8 0000000000000002 c00000001241dc00 c00000001249fa70
GPR12: c000007fd383ff90 c000007ffbda3f00 0000000000000000 0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR20: 0000000000000000 0000000000000000 000000003bbb7c02 c00000000162d534
GPR24: 00000000000000b1 0000000000000000 c0000000041e3d80 0000000000000000
GPR28: c0000000023de0a8 c000007fd5efc740 c0000000032c1ad0 c00000000003db34
[ 1.002318] NIP [c000000000526f98] trace_hardirqs_off+0x168/0x190
[ 1.002325] LR [c000000000526f94] trace_hardirqs_off+0x164/0x190
[ 1.002331] Call Trace:
[ 1.002335] [c00000001249fc70] [c000000000526f94] trace_hardirqs_off+0x164/0x190 (unreliable)
[ 1.002342] [c00000001249fcf0] [c00000000003db34] arch_local_irq_restore.part.0+0xa4/0x200
[ 1.002347] [c00000001249fd30] [c000000001c62c24] snooze_loop+0xb4/0x28c
[ 1.002353] [c00000001249fd80] [c000000001c612c8] cpuidle_enter_state+0x118/0xae0
[ 1.002358] [c00000001249fe50] [c00000000162d534] cpuidle_enter+0x44/0x60
[ 1.002363] [c00000001249fe90] [c000000000315cf8] call_cpuidle+0x48/0xa0
[ 1.002369] [c00000001249feb0] [c00000000031ffc0] cpuidle_idle_call+0x160/0x2d0
[ 1.002375] [c00000001249ff00] [c000000000320288] do_idle+0x158/0x200
[ 1.002384] [c00000001249ff50] [c000000000320714] cpu_startup_entry+0x44/0x50
[ 1.002394] [c00000001249ff80] [c00000000006a0b0] start_secondary+0x290/0x300
[ 1.002401] [c00000001249ffe0] [c00000000000e258] start_secondary_prolog+0x10/0x14
[ 1.002411] Code: 60000000 60420000 3d4201c1 894a3c68 2c0a0000 4082ff9c 3d4201c1 3c62ffcf 386386c8 992a3c68 4bd3a489 60000000 <0fe00000> 4bffff7c 49739cf9 60000000
[ 1.002426] irq event stamp: 0
[ 1.002429] hardirqs last enabled at (0): [<0000000000000000>] 0x0
[ 1.002434] hardirqs last disabled at (0): [<c00000000025d72c>] copy_process+0xecc/0x2910
[ 1.002440] softirqs last enabled at (0): [<c00000000025d72c>] copy_process+0xecc/0x2910
[ 1.002445] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 1.002448] ---[ end trace 0000000000000000 ]---
[ 1.002454] ------------[ cut here ]------------
[ 1.002457] RCU not watching for tracepoint
[ 1.002460] WARNING: ./include/trace/events/preemptirq.h:40 at trace_hardirqs_on+0x17c/0x1b0, CPU#177: swapper/177/0
[ 1.002468] Modules linked in: aes_gcm_p10_crypto crypto_simd cryptd
[ 1.002473] CPU: 177 UID: 0 PID: 0 Comm: swapper/177 Tainted: G W 7.1.0-rc6-next-20260601-dirty #2 PREEMPT(lazy)
[ 1.002478] Tainted: [W]=WARN
[ 1.002481] Hardware name: IBM,9043-MRU Power11 (architected) 0x820200 0xf000007 of:IBM,FW1110.11 (RF1110_119) hv:phyp pSeries
[ 1.002493] NIP: c000000000526a6c LR: c000000000526a68 CTR: 0000000000000000
[ 1.002502] REGS: c00000001249f9b0 TRAP: 0700 Tainted: G W (7.1.0-rc6-next-20260601-dirty)
[ 1.002512] MSR: 8000000002021033 <SF,VEC,ME,IR,DR,RI,LE> CR: 44000288 XER: 00000005
[ 1.002524] CFAR: c000000000261518 IRQMASK: 1
GPR00: c000000000526a68 c00000001249fc70 c00000000251a700 000000000000001f
GPR04: 3fffffffffff7fff 0000000000000001 c00000001249fa68 0000000000000001
GPR08: c000000003d2cce8 0000000000000002 c00000001241dc00 c00000001249fa70
GPR12: c000007fd383ff90 c000007ffbda3f00 0000000000000000 0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR20: 0000000000000000 0000000000000000 000000003bbb7c02 c00000000162d534
GPR24: 00000000000000b1 0000000000000000 c0000000041e3d80 0000000000000000
GPR28: c0000000023de0a8 c000007fd5efc740 c0000000032c1ad0 c00000000003dbc4
[ 1.002573] NIP [c000000000526a6c] trace_hardirqs_on+0x17c/0x1b0
[ 1.002580] LR [c000000000526a68] trace_hardirqs_on+0x178/0x1b0
[ 1.002586] Call Trace:
[ 1.002590] [c00000001249fc70] [c000000000526a68] trace_hardirqs_on+0x178/0x1b0 (unreliable)
[ 1.002600] [c00000001249fcf0] [c00000000003dbc4] arch_local_irq_restore.part.0+0x134/0x200
[ 1.002607] [c00000001249fd30] [c000000001c62c24] snooze_loop+0xb4/0x28c
[ 1.002614] [c00000001249fd80] [c000000001c612c8] cpuidle_enter_state+0x118/0xae0
[ 1.002620] [c00000001249fe50] [c00000000162d534] cpuidle_enter+0x44/0x60
[ 1.002625] [c00000001249fe90] [c000000000315cf8] call_cpuidle+0x48/0xa0
[ 1.002636] [c00000001249feb0] [c00000000031ffc0] cpuidle_idle_call+0x160/0x2d0
[ 1.002645] [c00000001249ff00] [c000000000320288] do_idle+0x158/0x200
[ 1.002651] [c00000001249ff50] [c000000000320714] cpu_startup_entry+0x44/0x50
[ 1.002655] [c00000001249ff80] [c00000000006a0b0] start_secondary+0x290/0x300
[ 1.002660] [c00000001249ffe0] [c00000000000e258] start_secondary_prolog+0x10/0x14
[ 1.002664] Code: 4bffff80 3d2201c1 89293c66 2c090000 4082ff6c 39200001 3d4201c1 3c62ffcf 386386c8 992a3c66 4bd3a9b5 60000000 <0fe00000> e9010060 4bffff44 60000000
[ 1.002678] irq event stamp: 0
[ 1.002680] hardirqs last enabled at (0): [<0000000000000000>] 0x0
[ 1.002688] hardirqs last disabled at (0): [<c00000000025d72c>] copy_process+0xecc/0x2910
[ 1.002696] softirqs last enabled at (0): [<c00000000025d72c>] copy_process+0xecc/0x2910
[ 1.002706] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 1.002712] ---[ end trace 0000000000000000 ]---
[...]
This is most probably due to generic entry/exit.
I am trying to find the root cause for this.
Regards,
Mukesh
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2026-06-01 13:27 [next20260529]powerpc/pseries: multiple WARNs: RCU not watching for tracepoint and lockdep_hardirq_context() during boot and cpuidle (Power11) Venkat Rao Bagalkote
2026-06-02 15:24 ` Shrikanth Hegde
2026-06-02 15:53 ` Mukesh Kumar Chaurasiya
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