Re: 2.6.31.4: WARNING: at arch/x86/kernel/hpet.c:390 hpet_next_event+0x70/0x80() [occurs when ACPI_PROCESSOR=y]

Justin Piszcz
2009-11-11T21:32:45Z

Hi,

> This also happens if cpufreq is a module ?
> There's no cpufreq code in that trace, so I'm puzzled.

It is not possible(?) to have CPUFREQ modularized:
| | [*] CPU Frequency scaling

The ACPI_FREQ option can be though and it happens with or without it being
a module.
| | <M> ACPI Processor P-States driver

(the first part)

The second part is because I had compiled all of the power options in
CPU_FREQ into the kernel, when I only copied w/ the ACPI processor
P-States driver, I no longer got the errors that I originally reported
(cpufreq-core).

The following error still occurs though, I found the offending kernel
option(s):

> CONFIG_ACPI_PROCESSOR=y
> CONFIG_ACPI_THERMAL=y

When this option is set, I get this:

[ 3.478541] usb 2-1: configuration #1 chosen from 1 choice
[ 3.491263] hub 2-1:1.0: USB hub found
[ 3.503731] hub 2-1:1.0: 8 ports detected
[ 3.524227] ------------[ cut here ]------------
[ 3.536449] WARNING: at arch/x86/kernel/hpet.c:390 hpet_next_event+0x70/0x80()
[ 3.548886] Hardware name:
[ 3.561191] Modules linked in:
[ 3.573404] Pid: 0, comm: swapper Not tainted 2.6.31.5 #12
[ 3.585755] Call Trace:
[ 3.597989] [<ffffffff81043180>] ? hpet_next_event+0x70/0x80
[ 3.610401] [<ffffffff81043180>] ? hpet_next_event+0x70/0x80
[ 3.622758] [<ffffffff810569a4>] ? warn_slowpath_common+0x74/0xd0
[ 3.635040] [<ffffffff81043180>] ? hpet_next_event+0x70/0x80
[ 3.647281] [<ffffffff81077916>] ? tick_dev_program_event+0x36/0xb0
[ 3.659534] [<ffffffff810772f9>] ? tick_broadcast_oneshot_control+0x119/0x120
[ 3.671816] [<ffffffff81076abd>] ? tick_notify+0x22d/0x420
[ 3.683947] [<ffffffff810700b7>] ? notifier_call_chain+0x37/0x70
[ 3.696066] [<ffffffff810763ab>] ? clockevents_notify+0x2b/0x90
[ 3.708096] [<ffffffff81244ac8>] ? acpi_idle_enter_bm+0x15f/0x2d3
[ 3.720113] [<ffffffff8124495e>] ? acpi_idle_enter_c1+0xf1/0xfc
[ 3.732057] [<ffffffff812e7a9a>] ? cpuidle_idle_call+0xba/0x120
[ 3.743996] [<ffffffff8102b832>] ? cpu_idle+0x62/0xc0
[ 3.755860] ---[ end trace 747bb91afa915135 ]---
[ 3.973002] usb 4-1: new low speed USB device using uhci_hcd and address 2
[ 4.209390] usb 4-1: New USB device found, idVendor=051d, idProduct=0002
[ 4.221469] usb 4-1: New USB device strings: Mfr=3, Product=1, SerialNumber=2

> Does acpi-cpufreq work when built as a module ?
> If it does, seeing the differences in output from booting with cpufreq.debug=7
> might yield some clues.

When the option is not set, dmesg is normal, no problems (but then, I cannot
run ACPI_FREQ) to achieve turbo mode on my CPU (the ACPI_FREQ driver
requires the PROCESSOR option to be enabled).

So your next question, does that error occur when processor.ko is a
module? Yes:

[ 6.331411] processor LNXCPU:00: registered as cooling_device0
[ 6.340372] e1000e: Intel(R) PRO/1000 Network Driver - 1.0.15-NAPI
[ 6.340373] e1000e: Copyright(c) 1999 - 2009 Intel Corporation.
[ 6.340402] e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[ 6.340411] e1000e 0000:00:19.0: setting latency timer to 64
[ 6.397934] ACPI: Processor [CPU0] (supports
[ 6.398080] e1000e 0000:00:19.0: irq 38 for MSI/MSI-X
[ 6.414813] 8 throttling states)
[ 6.432030] ACPI: CPU1 (power states: C1[C1] C3[C3])
[ 6.448937] processor LNXCPU:01: registered as cooling_device1
[ 6.465770] ACPI: Processor [CPU1] (supports 8 throttling states)
[ 6.483179] ACPI: CPU2 (power states: C1[C1] C3[C3])
[ 6.499971] processor LNXCPU:02: registered as cooling_device2
[ 6.516762] ACPI: Processor [CPU2] (supports 8 throttling states)
[ 6.534255] ACPI: CPU3 (power states: C1[C1] C3[C3])
[ 6.551147] processor LNXCPU:03: registered as cooling_device3
[ 6.568112] ACPI: Processor [CPU3] (supports 8 throttling states)
[ 6.609973] ACPI: CPU4 (power states: C1[C1] C3[C3])
[ 6.627180] processor LNXCPU:04: registered as cooling_device4
[ 6.644334] ACPI: Processor [CPU4] (supports 8 throttling states)
[ 6.662005] ACPI: CPU5 (power states: C1[C1] C3[C3])
[ 6.679323] processor LNXCPU:05: registered as cooling_device5
[ 6.696652] ACPI: Processor [CPU5] (supports 8 throttling states)
[ 6.714578] ACPI: CPU6 (power states: C1[C1] C3[C3])
[ 6.716148] ------------[ cut here ]------------
[ 6.716153] WARNING: at arch/x86/kernel/hpet.c:390 hpet_next_event+0x70/0x80()
[ 6.716154] Hardware name:
[ 6.716155] Modules linked in: e1000e(+) thermal processor(+)
[ 6.716158] Pid: 0, comm: swapper Not tainted 2.6.31.5 #15
[ 6.716159] Call Trace:
[ 6.716161] [<ffffffff81042090>] ? hpet_next_event+0x70/0x80
[ 6.716163] [<ffffffff81042090>] ? hpet_next_event+0x70/0x80
[ 6.716166] [<ffffffff810558b4>] ? warn_slowpath_common+0x74/0xd0
[ 6.716168] [<ffffffff81042090>] ? hpet_next_event+0x70/0x80
[ 6.716170] [<ffffffff81076826>] ? tick_dev_program_event+0x36/0xb0
[ 6.716172] [<ffffffff81076209>] ? tick_broadcast_oneshot_control+0x119/0x120
[ 6.716174] [<ffffffff810759cd>] ? tick_notify+0x22d/0x420
[ 6.716176] [<ffffffff8106efc7>] ? notifier_call_chain+0x37/0x70
[ 6.716178] [<ffffffff810752bb>] ? clockevents_notify+0x2b/0x90
[ 6.716182] [<ffffffffa00022a0>] ? acpi_idle_enter_bm+0x15f/0x2d3 [processor]
[ 6.716185] [<ffffffffa0002136>] ? acpi_idle_enter_c1+0xf1/0xfc [processor]
[ 6.716188] [<ffffffff812de4fa>] ? cpuidle_idle_call+0xba/0x120
[ 6.716191] [<ffffffff8102b7f2>] ? cpu_idle+0x62/0xc0
[ 6.716192] ---[ end trace dc2616d16ddbce62 ]---
[ 6.852167] 0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) 00:1c:c0:f6:b6:50
[ 6.852169] 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
[ 6.852244] 0000:00:19.0: eth0: MAC: 10, PHY: 9, PBA No: ffffff-0ff
[ 6.852320] e1000e 0000:04:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 6.852334] e1000e 0000:04:00.0: setting latency timer to 64
[ 7.115593] processor LNXCPU:06: registered as cooling_device6
[ 7.115992] e1000e 0000:04:00.0: irq 39 for MSI/MSI-X
[ 7.115994] e1000e 0000:04:00.0: irq 40 for MSI/MSI-X
[ 7.131290] ACPI: Processor [CPU6] (supports 8 throttling states)
[ 7.147607] ACPI: CPU7 (power states: C1[C1] C3[C3])
[ 7.163485] processor LNXCPU:07: registered as cooling_device7
[ 7.179105] ACPI: Processor [CPU7] (supports 8 throttling states)

Justin.