linux-kernel - Re: Regression: 20 ACPI interrupts per second on EEEPC 4G

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Date:	Sat, 11 Apr 2009 10:14:43 +0100
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	Alexey Starikovskiy <aystarik@...il.com>
CC:	linux-acpi@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>
Subject: Re: Regression: 20 ACPI interrupts per second on EEEPC 4G

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@...n-eeepc:/sys/firmware/acpi/interrupts$ cat sci; sleep 5; cat sci
    2583
    2680

Thanks
Alan
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