QUESTION: 2.5 adds 1 to systats even for non I/O operations

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From: Ricardo Galli <gallir@uib.es>
To: linux-kernel@vger.kernel.org
Subject: QUESTION: 2.5 adds 1 to systats even for non I/O operations
Date: Wed, 7 May 2003 22:34:00 +0200	[thread overview]
Message-ID: <200305072234.00733.gallir@uib.es> (raw)

I'm working in a daemon to control cpufreq and devices 
(http://freshmeat.net/projects/cpudyn/)

I've just noticed that kernel 2.5 always add one (1) to /proc/diskstats 
and /sys/block/hdX/stat "reads" field for ioctl's requests that don't 
generate data I/O. 

For example for checking the status of the disk (standby, active, sleep) 
or putting the disk in standby.

Is that correct? Do I have to take it in account always?

Thanks in advance.

-- 
  ricardo galli       GPG id C8114D34

                 reply	other threads:[~2003-05-07 20:21 UTC|newest]

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