From: Dave Chinner <dchinner@redhat.com>
Date: Tue, 23 Mar 2010 00:43:17 +0000 (+1100)
Subject: xfs: introduce new internal log vector structure
X-Git-Tag: v2.6.35-rc1~468^2^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=55b66332d0921146a914d5d75a7b870a65dc4938;p=pandora-kernel.git

xfs: introduce new internal log vector structure

The current log IO vector structure is a flat array and not
extensible. To make it possible to keep separate log IO vectors for
individual log items, we need a method of chaining log IO vectors
together.

Introduce a new log vector type that can be used to wrap the
existing log IO vectors on use that internally to the log. This
means that the existing external interface (xfs_log_write) does not
change and hence no changes to the transaction commit code are
required.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
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