From: majianpeng <majianpeng@gmail.com>
Date: Wed, 31 Oct 2012 00:59:10 +0000 (+1100)
Subject: md: Update checkpoint of resync/recovery based on time.
X-Git-Tag: v3.8-rc1~73^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54f89341e8b8da0cdac8a7b873491739de19f098;p=pandora-kernel.git

md: Update checkpoint of resync/recovery based on time.

md will current only only checkpoint recovery or resync ever 1/16th
of the device size.  As devices get larger this can become a long time
an so a lot of work that might need to be duplicated after a shutdown.

So add a time-based checkpoint.  Every 5 minutes limits the amount of
duplicated effort to at most 5 minutes, and has almost zero impact on
performance.

[changelog entry re-written by NeilBrown]

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
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