From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: Andreas Hartmann <andihartmann@01019freenet.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: intel_ips produces constant load of 1
Date: Mon, 21 Mar 2011 11:04:04 -0700 [thread overview]
Message-ID: <20110321110404.6a71a404@jbarnes-desktop> (raw)
In-Reply-To: <im2ik4$3dd$1@ID-44327.news.uni-berlin.de>
On Sat, 19 Mar 2011 16:38:38 +0100
Andreas Hartmann <andihartmann@01019freenet.de> wrote:
> Hello,
>
> on my MSI CR620 laptop, intel_ips produces a constant load of 1, even if
> the machine is idle.
>
> The ips-monitor hangs in D state:
>
> ps aux | grep ips
> root 593 0.0 0.0 0 0 ? S 17:20 0:00
> [ips-adjust]
> root 594 0.0 0.0 0 0 ? D 17:20 0:00
> [ips-monitor]
>
> If the module isn't loaded, the load of the machine in idle mode is 0 as
> expected.
This is a reporting problem, and probably due to the schedule() call
and associated task state in the ips-monitor thread. I thought setting
the task state to interruptible would prevent this, but it seems like
it's not enough for the deferrable on-stack timers?
At any rate, it's not actually causing increased CPU usage, so you can
safely ignore it until we have a fix.
--
Jesse Barnes, Intel Open Source Technology Center
next prev parent reply other threads:[~2011-03-21 18:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-19 15:38 intel_ips produces constant load of 1 Andreas Hartmann
2011-03-21 18:04 ` Jesse Barnes [this message]
2011-03-22 7:00 ` Andreas Hartmann
2011-03-22 15:49 ` Jesse Barnes
2011-03-22 20:25 ` Jesse Barnes
2011-03-23 18:15 ` Andreas Hartmann
2011-03-23 18:20 ` Jesse Barnes
2011-03-23 19:44 ` Andreas Hartmann
2011-03-25 18:23 ` Andreas Hartmann
2011-03-25 18:24 ` Jesse Barnes
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