linux-kernel - why does /proc/sys/fs/file-nr not match total of /proc/<pid>/fd entries?

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Message-ID: <4D389D8B.7010301@genband.com>
Date:	Thu, 20 Jan 2011 14:39:39 -0600
From:	Chris Friesen <chris.friesen@...band.com>
To:	linux-kernel@...r.kernel.org
Subject: why does /proc/sys/fs/file-nr not match total of /proc/<pid>/fd entries?

Someone asked me a question that I couldn't answer, so I'm passing it on
to you.

Why do the values in /proc/sys/fs/file-nr not match up with the value
given by "ls -al /proc/[0-9]*/fd/ | grep '>' | wc -l" ?

For instance, on my desktop /proc/sys/fs/file-nr gives "9728    0
306699" but the other command gives "2894".

Where is the discrepancy coming from?

Thanks,
Chris

-- 
Chris Friesen
Software Developer
GENBAND
chris.friesen@...band.com
www.genband.com
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