linux-kernel - Re: Keeping track of spin-down/spin-up and causes of spin-up?

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Message-ID: <20080708074818.GA341@dose.home.local>
Date:	Tue, 8 Jul 2008 09:48:18 +0200
From:	Tino Keitel <tino.keitel@....de>
To:	linux-kernel@...r.kernel.org
Subject: Re: Keeping track of spin-down/spin-up and causes of spin-up?

On Tue, Jul 08, 2008 at 03:25:18 -0400, Stefan Monnier wrote:
> I clearly remember seeing a reference to some system that allowed to
> keep track of causes of disk spin-up, but Google seems to say
> I'm deluded.  [ Or maybe my memory confused it for the facility used by
> powertop to keep track of causes of CPU wake-ups? ]
> 
> In any case, I have a machine here whose disk keeps spinning back up
> on a regular basis, and I can't seem to find any correlated event.
> Is there a tool that can help me track down the reason why the disk
> is accessed?

See Documentation/laptops/laptop-mode.txt, the notes regarding
block_dump.

Regards,
Tino
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