From: Lars Ellenberg <lars.ellenberg@linbit.com>
Date: Fri, 22 Nov 2013 11:32:01 +0000 (+0100)
Subject: drbd: gather detailed timing statistics for drbd_requests
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~74^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5f891b2234dbab8c8797111a61519d0728ef855;p=pandora-kernel.git

drbd: gather detailed timing statistics for drbd_requests

Record (in jiffies) how much time a request spends in which stages.
Followup commits will use and present this additional timing information
so we can better locate and tackle the root causes of latency spikes,
or present the backlog for asynchronous replication.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---

Reading git-diff-tree failed