cpu hog reading battery info

cpu hog reading battery info

[Pippo Caloggero]

Hi after upgrading to 2.6.11 doing a
cat /proc/acpi/battery/BAT0/info
hogs my cpu to the point that X and the mouse block for 1 second.
This is especially annoyng as for example kde battery monitor do that 
every 20 secs to read battery capacity.

Is it a known bug? Is there some way to dig into it?

Thank you very  much
Matteo


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Re: cpu hog reading battery info

[Oisín Mac Fhearaí]

On Friday 17 June 2005 14:01, Pippo Caloggero wrote:
> Hi after upgrading to 2.6.11 doing a
> cat /proc/acpi/battery/BAT0/info
> hogs my cpu to the point that X and the mouse block for 1 second.
> This is especially annoyng as for example kde battery monitor do that
> every 20 secs to read battery capacity.
>
> Is it a known bug? Is there some way to dig into it?

There's the EC burst mode patch out there which replaces the busy-wait 
spinlocks in drivers/acpi/ec.c with semaphores:
http://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/patches/to-akpm/acpi-20050601041442-dtor-KwM2v4JqSEzeGshsqgM8IUPJkLQgvAqAJm6DLlPSJJU@public.gmane.org

Maybe that'll apply for you.

Oisín


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