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Message-ID: <aDtJ92foPUYmGheF@debian.local>
Date: Sat, 31 May 2025 19:27:03 +0100
From: Chris Bainbridge <chris.bainbridge@...il.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>,
linux-rtc@...r.kernel.org,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Mateusz Jończyk <mat.jonczyk@...pl>,
lkml <linux-kernel@...r.kernel.org>,
Anna-Maria Behnsen <anna-maria@...utronix.de>,
Frederic Weisbecker <frederic@...nel.org>,
Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH] timekeeping: Add a lockdep override in tick_freeze().
Hi,
I'm getting "WARNING: inconsistent lock state" on resume with this
commit (92e250c624ea37fde64bfd624fd2556f0d846f18):
[ 43.747069] ACPI: \_SB_.PEP_: Successfully transitioned to state screen off
[ 43.753611] ACPI: \_SB_.PEP_: Successfully transitioned to state lps0 ms entry
[ 43.753777] ACPI: \_SB_.PEP_: Successfully transitioned to state lps0 entry
[ 43.838479] amd_pmc AMDI0005:00: failed to set RTC: -22
[ 43.838489] PM: suspend-to-idle
[ 43.838542] amd_pmc: SMU idlemask s0i3: 0xc00e0eb5
[ 46.246882] Timekeeping suspended for 2.528 seconds
[ 46.249132] PM: Triggering wakeup from IRQ 9
[ 46.249292] ACPI: PM: ACPI fixed event wakeup
[ 46.249297] PM: resume from suspend-to-idle
[ 46.250801] amd_pmc AMDI0005:00: Last suspend didn't reach deepest state
[ 46.251096] ACPI: \_SB_.PEP_: Successfully transitioned to state lps0 exit
[ 46.257167] ACPI: \_SB_.PEP_: Successfully transitioned to state lps0 ms exit
[ 46.258450] ACPI: \_SB_.PEP_: Successfully transitioned to state screen on
[ 46.259652] ACPI: EC: interrupt unblocked
[ 46.291758] PM: noirq resume of devices complete after 32.885 msecs
[ 46.291907] ================================
[ 46.291909] WARNING: inconsistent lock state
[ 46.291911] 6.15.0-rc1-00002-g92e250c624ea #379 Not tainted
[ 46.291914] --------------------------------
[ 46.291915] inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
[ 46.291917] irq/9-acpi/142 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 46.291921] ffffffff88e48d18 (rtc_lock){?...}-{3:3}, at: cmos_interrupt+0x21/0x110
[ 46.291939] {IN-HARDIRQ-W} state was registered at:
[ 46.291941] lock_acquire+0xc9/0x2d0
[ 46.291946] _raw_spin_lock+0x30/0x40
[ 46.291951] cmos_interrupt+0x21/0x110
[ 46.291956] __handle_irq_event_percpu+0x81/0x290
[ 46.291962] handle_irq_event+0x38/0x70
[ 46.291966] handle_edge_irq+0x85/0x210
[ 46.291970] __common_interrupt+0x45/0xd0
[ 46.291973] common_interrupt+0x80/0xa0
[ 46.291977] asm_common_interrupt+0x26/0x40
[ 46.291981] cpuidle_enter_state+0x113/0x540
[ 46.291985] cpuidle_enter+0x2d/0x40
[ 46.291989] do_idle+0x1f5/0x250
[ 46.291992] cpu_startup_entry+0x29/0x30
[ 46.291994] start_secondary+0x10c/0x130
[ 46.291998] common_startup_64+0x13e/0x141
[ 46.292002] irq event stamp: 877
[ 46.292004] hardirqs last enabled at (877): [<ffffffff88778a90>] _raw_spin_unlock_irqrestore+0x40/0x50
[ 46.292010] hardirqs last disabled at (876): [<ffffffff8877884c>] _raw_spin_lock_irqsave+0x5c/0x60
[ 46.292014] softirqs last enabled at (362): [<ffffffff87b0dc3c>] __irq_exit_rcu+0xcc/0xf0
[ 46.292019] softirqs last disabled at (353): [<ffffffff87b0dc3c>] __irq_exit_rcu+0xcc/0xf0
[ 46.292022]
other info that might help us debug this:
[ 46.292024] Possible unsafe locking scenario:
[ 46.292025] CPU0
[ 46.292026] ----
[ 46.292027] lock(rtc_lock);
[ 46.292029] <Interrupt>
[ 46.292030] lock(rtc_lock);
[ 46.292032]
*** DEADLOCK ***
[ 46.292033] no locks held by irq/9-acpi/142.
[ 46.292035]
stack backtrace:
[ 46.292040] CPU: 1 UID: 0 PID: 142 Comm: irq/9-acpi Not tainted 6.15.0-rc1-00002-g92e250c624ea #379 PREEMPT(voluntary)
[ 46.292046] Hardware name: HP HP Pavilion Aero Laptop 13-be0xxx/8916, BIOS F.17 12/18/2024
[ 46.292049] Call Trace:
[ 46.292052] <TASK>
[ 46.292058] dump_stack_lvl+0x6e/0x90
[ 46.292063] print_usage_bug.part.0+0x22c/0x2c0
[ 46.292067] mark_lock+0x6f7/0x890
[ 46.292072] ? __lock_acquire+0x449/0x21c0
[ 46.292077] __lock_acquire+0x7e5/0x21c0
[ 46.292080] ? psi_task_switch+0x10a/0x330
[ 46.292086] lock_acquire+0xc9/0x2d0
[ 46.292088] ? cmos_interrupt+0x21/0x110
[ 46.292094] ? acpi_write_bit_register+0x79/0xf0
[ 46.292102] _raw_spin_lock+0x30/0x40
[ 46.292106] ? cmos_interrupt+0x21/0x110
[ 46.292110] cmos_interrupt+0x21/0x110
[ 46.292115] rtc_handler+0x28/0xc0
[ 46.292120] acpi_ev_fixed_event_detect+0xc8/0x140
[ 46.292127] ? irq_thread+0xa4/0x340
[ 46.292129] acpi_ev_sci_xrupt_handler+0x13/0x40
[ 46.292132] acpi_irq+0x16/0x30
[ 46.292136] irq_thread_fn+0x1d/0x50
[ 46.292139] irq_thread+0x1d5/0x340
[ 46.292140] ? irq_copy_pending.isra.0+0x70/0x70
[ 46.292144] ? irq_finalize_oneshot.part.0+0xc0/0xc0
[ 46.292147] ? irq_forced_thread_fn+0x70/0x70
[ 46.292149] kthread+0x10a/0x250
[ 46.292154] ? kthreads_online_cpu+0x130/0x130
[ 46.292158] ret_from_fork+0x31/0x50
[ 46.292162] ? kthreads_online_cpu+0x130/0x130
[ 46.292166] ret_from_fork_asm+0x11/0x20
[ 46.292174] </TASK>
[ 46.292918] PM: early resume of devices complete after 0.829 msecs
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