From: Joe Thornber <ejt@redhat.com>
Date: Fri, 9 Aug 2013 11:59:30 +0000 (+0100)
Subject: dm btree: prefetch child nodes when walking tree for a dm_btree_del
X-Git-Tag: v3.12-rc1~70^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04f17c802f447e76d13ade5bb78fbbf34baef0f8;p=pandora-kernel.git

dm btree: prefetch child nodes when walking tree for a dm_btree_del

dm-btree now takes advantage of dm-bufio's ability to prefetch data via
dm_bm_prefetch().  Prior to this change many btree node visits were
causing a synchronous read.

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