From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Tue, 29 May 2012 15:06:54 +0000 (+0200)
Subject: Btrfs: use delayed ref sequence numbers for all fs-tree updates
X-Git-Tag: v3.5-rc1~17^2^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95a06077f7edbd00d32612562be4d857a5b7df54;p=pandora-kernel.git

Btrfs: use delayed ref sequence numbers for all fs-tree updates

The sequence number for delayed refs is needed to postpone certain delayed
refs for a very short period while walking backrefs. Before the tree
modification log, we thought we'd only have to hold back those references
that don't have a counter operation.

While now we've the tree mod log, we're rewinding fs tree blocks to a
defined consistent state. We cannot know in advance for which tree block
we'll be doing rewind operations later. Therefore, we must postpone all the
delayed refs for fs-tree blocks, even those having a counter operation.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
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