From: Filipe Manana <fdmanana@suse.com>
Date: Mon, 28 Jul 2014 18:34:35 +0000 (+0100)
Subject: Btrfs: unlock nodes earlier when inserting items in a btree
X-Git-Tag: fixes-against-v3.18-rc2~120^2~83
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24cdc847d9842bdfd85a005ebc39050bcbc7acba;p=pandora-kernel.git

Btrfs: unlock nodes earlier when inserting items in a btree

In ctree.c:setup_items_for_insert(), we can unlock all nodes in our
path before we process the leaf (shift items and data, adjust data
offsets, etc). This allows for better btree concurrency, as we're
often holding a write lock on at least the node at level 1.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
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