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SubjectRe: 2.6.31.4: WARNING: at arch/x86/kernel/hpet.c:390 hpet_next_event+0x70/0x80() [occurs when ACPI_PROCESSOR=y]
On Wed, 11 Nov 2009, Justin Piszcz wrote:

> Hi,

Any other clues/things to try to find out why this is happening?

Here is the dmesg from Phoronix but they are using an i750 not an i870,
the only differences that I can note are below:
http://www.phoronix.com/scan.php?page=article&item=intel_p55&num=3

Phoronix:
[ 0.468994] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 24, 25, 26, 27, 28, 0
[ 0.468999] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
[ 0.472841] hpet: hpet2 irq 24 for MSI
[ 0.473257] hpet: hpet3 irq 25 for MSI
[ 0.477260] hpet: hpet4 irq 26 for MSI
[ 0.481251] hpet: hpet5 irq 27 for MSI

My host:
[ 0.656054] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 24, 25, 26, 27, 28, 0
[ 0.656060] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
[ 0.659020] hpet: hpet2 irq 24 for MSI
[ 0.659253] hpet: hpet3 irq 25 for MSI
[ 0.659993] hpet: hpet4 irq 26 for MSI
[ 0.660317] hpet: hpet5 irq 27 for MSI
[ 0.661001] hpet: hpet6 irq 28 for MSI

Much of their dmesg is the same as mine with the exception of the of the
problem I am reporting, what is the best way to debug this problem
further?

Perhaps the Phoronix configuration does not have processor loaded in the
kernel or as a module?

Again, the problem:
[ 3.318770] cpuidle: using governor ladder
[ 3.321556] ------------[ cut here ]------------
[ 3.321560] WARNING: at arch/x86/kernel/hpet.c:390 hpet_next_event+0x70/0x80()
[ 3.321561] Hardware name:
[ 3.321562] Modules linked in:
[ 3.321564] Pid: 0, comm: swapper Not tainted 2.6.31.5 #17
[ 3.321565] Call Trace:
[ 3.321567] [<ffffffff81042f00>] ? hpet_next_event+0x70/0x80
[ 3.321568] [<ffffffff81042f00>] ? hpet_next_event+0x70/0x80
[ 3.321571] [<ffffffff81056724>] ? warn_slowpath_common+0x74/0xd0
[ 3.321573] [<ffffffff81042f00>] ? hpet_next_event+0x70/0x80
[ 3.321576] [<ffffffff81077696>] ? tick_dev_program_event+0x36/0xb0
[ 3.321578] [<ffffffff81077079>] ? tick_broadcast_oneshot_control+0x119/0x120
[ 3.321579] [<ffffffff8107683d>] ? tick_notify+0x22d/0x420
[ 3.321581] [<ffffffff8106fe37>] ? notifier_call_chain+0x37/0x70
[ 3.321583] [<ffffffff8107612b>] ? clockevents_notify+0x2b/0x90
[ 3.321586] [<ffffffff81244848>] ? acpi_idle_enter_bm+0x15f/0x2d3
[ 3.321587] [<ffffffff812446de>] ? acpi_idle_enter_c1+0xf1/0xfc
[ 3.321590] [<ffffffff812e6d7a>] ? cpuidle_idle_call+0xba/0x120
[ 3.321593] [<ffffffff8102b832>] ? cpu_idle+0x62/0xc0
[ 3.321596] ---[ end trace cac202f11005305c ]---
[ 3.553852] cpuidle: using governor menu

Justin.





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