From mboxrd@z Thu Jan  1 00:00:00 1970
From: George Shuklin <george.shuklin@gmail.com>
Subject: Why all raid devices do have zero 'time in queue' value?
Date: Sun, 11 Mar 2012 02:33:34 +0400
Message-ID: <4F5BD6BE.7020405@gmail.com>
Reply-To: device-mapper development <dm-devel@redhat.com>
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Good day.

I've look to stat for all MD devices I have (raid0, raid1, raid10) - all 
of them reports 0 for time_in_queue field in /sys/block/mdX/stat file.

Is any reason why all raid devices contains no information about time 
spent on requests processing?

Thanks.