From: Mikulas Patocka <mpatocka@redhat.com>
Date: Tue, 9 Jun 2015 21:22:05 +0000 (-0400)
Subject: dm stats: collect and report histogram of IO latencies
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~116^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dfcfac3e4cd94abef779297fab6adfd2dbcf52fa;p=pandora-kernel.git

dm stats: collect and report histogram of IO latencies

Add an option to dm statistics to collect and report a histogram of
IO latencies.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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