On Thu, Nov 27, 2008 at 08:52:48AM -0500, Jody McIntyre wrote:

I was thinking about your first suggestion but note that there is also
/proc/diskstats as well as /sys/block/<dev>/stat.  The advantage of
having everything in one file is that you only have to open one file
when gathering statistics on many arrays, and /proc/mdstat already
exists as a precedent.  I could add individual array statistics files as
well if useful.

/proc contains a lot of legacy junk but nowadays the trend is that you
should not add new files under /proc that are not process-related.
Changing /proc/mdstat is IMHO out of question since it is part of the
user visible ABI and breaking that is a big no-no. So if you want all
info in a single file that pretty much leaves only debugfs.

Gabor

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     MTA SZTAKI Computer and Automation Research Institute
                Hungarian Academy of Sciences
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