From 4646015d7e4ca5a4dc19427fb0a0aeff15a4fd91 Mon Sep 17 00:00:00 2001
From: Joe Thornber <ejt@redhat.com>
Date: Mon, 6 Oct 2014 15:27:26 +0100
Subject: [PATCH] dm transaction manager: add support for prefetching blocks of
 metadata

Introduce the dm_tm_issue_prefetches interface.  If you're using a
non-blocking clone the tm will build up a list of requested blocks that
weren't in core.  dm_tm_issue_prefetches will request those blocks to be
prefetched.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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