Re: [BISECTED] 20 ACPI interrupts per second on EEEPC 4G

yakui_zhao
2009-04-13T02:03:06Z

On Sun, 2009-04-12 at 23:54 +0800, Alan Jenkins wrote:
> Alan Jenkins wrote:
> > Alexey Starikovskiy wrote:
> >> Alan Jenkins wrote:
> >>> On latest git, powertop shows 20 ACPI interrupts per second.
> >>> Previously, this was closer to 1 per second. See attached output (a
> >>> vs b, "a" is from 2.6.29-rc8).
> >>>
> >>> This is from a pretty sparse KDE desktop. Normally I run
> >>> gnome-power-manager, but I killed it to make sure that wasn't
> >>> causing any problems.
> >>>
> >
> >>> gpe18: 60975 enabled
> >>> gpe_all: 60975
> >>> sci: 60975
> >>>
> >>> which I presume means lots of EC interrupts.
> >>>
> >>> [ 0.134068] ACPI: EC: GPE = 0x18, I/O: command/status = 0x66,
> >>> data = 0x62
> >>>
> >
> >> This patch looks to be a suspect:
> >> 34ff4dbccccce54c83b1234d39b7ad9e548a75dd,
> >> Please check if reversing it helps
> >
> > No, I still get 20 ACPI interrupts per second.
> >
> > I tried without powertop, just in case that was provoking it, but it
> > still happens:
> >
> > alan@alan-eeepc:/sys/firmware/acpi/interrupts$ cat sci; sleep 5; cat sci
> > 2583
> > 2680
>
> I did wonder whether this was due to thermal polling. So look what I
> found with bisection :-).
Does the issue still exist if the following commit is reverted?
Thanks.
>
>
> b1569e99c795bf83b4ddf41c4f1c42761ab7f75e is first bad commit
> commit b1569e99c795bf83b4ddf41c4f1c42761ab7f75e
> Author: Matthew Garrett <mjg59@srcf.ucam.org>
> Date: Wed Dec 3 17:55:32 2008 +0000
>
> ACPI: move thermal trip handling to generic thermal layer
>
> The ACPI code currently carries its own thermal trip handling,
> meaning that
> any other thermal implementation will need to reimplement it. Move
> the code
> to the generic thermal layer.
>
>
> Regards
> Alan
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