linux-kernel - Re: Reading EeePC900 battery info causes stalls

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Message-ID: <48D4EDD2.5030603@suse.de>
Date:	Sat, 20 Sep 2008 16:34:26 +0400
From:	Alexey Starikovskiy <astarikovskiy@...e.de>
To:	Sitsofe Wheeler <sitsofe@...oo.com>
CC:	linux-kernel@...r.kernel.org, lenb@...nel.org
Subject: Re: Reading EeePC900 battery info causes stalls

Sitsofe Wheeler wrote:
> Sitsofe Wheeler wrote:
>> Alexey Starikovskiy wrote:
>>> Could you cat /proc/interrupts ?
>>
>>            CPU0
>>   0:     106942   IO-APIC-edge      timer
>>   1:        426   IO-APIC-edge      i8042
>>   8:         41   IO-APIC-edge      rtc0
>>   9:      27346   IO-APIC-fasteoi   acpi
>>  12:       6840   IO-APIC-edge      i8042
>>  14:          0   IO-APIC-edge      ata_piix
>>  15:        203   IO-APIC-edge      ata_piix
>>  16:      92357   IO-APIC-fasteoi   uhci_hcd:usb5, HDA Intel, 
>> i915@pci:0000:00:02.0
>>  18:      38195   IO-APIC-fasteoi   ath, uhci_hcd:usb4
>>  19:          0   IO-APIC-fasteoi   uhci_hcd:usb3
>>  23:      25150   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
>> NMI:          0   Non-maskable interrupts
>> LOC:     142112   Local timer interrupts
>> TRM:          0   Thermal event interrupts
>> SPU:          0   Spurious interrupts
>> ERR:          0
>> MIS:          0
> 
> and here are the interrupts from the (seemingly working) EeePC's Xandros 
> 2.6.21.4 install:
> 
>            CPU0
>   0:       6486    XT-PIC-XT        timer
>   1:        107    XT-PIC-XT        i8042
>   2:          0    XT-PIC-XT        cascade
>   3:          0    XT-PIC-XT        uhci_hcd:usb2
>   5:        735    XT-PIC-XT        uhci_hcd:usb1, ehci_hcd:usb5
>   9:        219    XT-PIC-XT        acpi
>  10:       8171    XT-PIC-XT        uhci_hcd:usb3, pciehp, wifi0
>  11:        107    XT-PIC-XT        HDA Intel, i915@pci:0000:00:02.0, 
> uhci_hcd:usb4, pciehp
>  12:        236    XT-PIC-XT        i8042
>  14:          0    XT-PIC-XT        libata
>  15:       3475    XT-PIC-XT        libata
> NMI:          0
> ERR:          0
> 
> and here is the kernel cmdline that the Xandros install uses:
> quiet rw vga=785 irqpoll root=/dev/sda1
> 
> I've got a feeling I know what direction this is going in...
> 
Right, could you please check if irqpoll is the key to success?

Thanks,
Alex.
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