From: Joe Thornber <ejt@redhat.com>
Date: Mon, 6 Oct 2014 14:27:26 +0000 (+0100)
Subject: dm transaction manager: add support for prefetching blocks of metadata
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~22^2~44
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4646015d7e4ca5a4dc19427fb0a0aeff15a4fd91;p=pandora-kernel.git

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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