linux-kernel - Re: [PATCH V2] Change ACPI IPMI support to "default y"

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Message-ID: <1392930047.20109.6.camel@x230>
Date:	Thu, 20 Feb 2014 21:00:48 +0000
From:	Matthew Garrett <matthew.garrett@...ula.com>
To:	"rja@....com" <rja@....com>
CC:	"lenb@...nel.org" <lenb@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"minyard@....org" <minyard@....org>,
	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH V2] Change ACPI IPMI support to "default y"

On Thu, 2014-02-20 at 14:59 -0600, Russ Anderson wrote:
> On Thu, Feb 20, 2014 at 08:46:04PM +0000, Matthew Garrett wrote:
> > On Thu, 2014-02-20 at 14:40 -0600, Russ Anderson wrote:
> > 
> > > This is also a problem for systems with functional BMCs.  Our
> > > large cluster systems do all IPMI traffic (monitoring) through
> > > a system controller back door.  We do not want the kernel
> > > doing IPMI commands on those systems.
> > 
> > Why not?
> 
> Because some customers want to use cpu cycles for their
> application and let the ipmi monitoring go on through
> the system controller network.

Why is it generating any significant amount of CPU load? We're not
talking about a high-bandwidth interface here.

-- 
Matthew Garrett <matthew.garrett@...ula.com>