From: Joe Thornber <ejt@redhat.com>
Date: Fri, 10 May 2013 13:37:21 +0000 (+0100)
Subject: dm thin: generate event when metadata threshold passed
X-Git-Tag: v3.10-rc1~12^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e;p=pandora-kernel.git

dm thin: generate event when metadata threshold passed

Generate a dm event when the amount of remaining thin pool metadata
space falls below a certain level.

The threshold is taken to be a quarter of the size of the metadata
device with a minimum threshold of 4MB.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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