dm persistent metadata: add space map threshold callback
authorJoe Thornber <ejt@redhat.com>
Fri, 10 May 2013 13:37:20 +0000 (14:37 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Fri, 10 May 2013 13:37:20 +0000 (14:37 +0100)
Add a threshold callback to dm persistent data space maps.

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

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