linux-kernel - Re: [Openipmi-developer] modprobe ipmi

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Date:	Thu, 21 May 2009 07:37:03 -0500
From:	Corey Minyard <minyard@....org>
To:	Ferenc Wagner <wferi@...f.hu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	openipmi-developer@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [Openipmi-developer] modprobe ipmi_si hangs under 2.6.30-rc5

Ferenc Wagner wrote:
> Corey Minyard <minyard@....org> writes:
>
>   
>> Ferenc Wagner wrote:
>>
>>     
>>> Just out of interest, how often does the driver wake up to check
>>> the inteface?
>>>       
>> When idle, the driver wakes up every 10ms to check for something on
>> the driver.
>>     
>
> Wow, 100 times per second, that sure sounds gross for piping out SEL
> entries!  Though it certainly doesn't matter much for our servers, but
> hasn't it got the potential to heavily tax laptop batteries?  Or is
> that why ipmi_si isn't loaded automatically by udev?
>   
IPMI is used for a lot of things beyond just getting SEL entries.  I 
some cases (probably most) it's excessive, in others it's not.

However, AFAIK IPMI hardware is only available in server systems.  I 
don't think it's ever been used in a laptop.

-corey
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