From: Jeff Liu <jeff.liu@oracle.com>
Date: Mon, 28 Jan 2013 13:25:35 +0000 (+0800)
Subject: xfs: add a helper to figure out the space log reservation per item
X-Git-Tag: v3.9-rc1~134^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4f3b57832ba39223c6f8823d07b9fb206e282ced;p=pandora-kernel.git

xfs: add a helper to figure out the space log reservation per item

Add a new helper xfs_calc_buf_res() to calcuate out the transaction space
reservations per item.  xfs_buf_log_overhead() is used to figure out the
extra space for struct xfs_buf_log_format that gets written into the log
for every buffer as well as a log opheader, i.e. struct xlog_op_header.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
CC: Dave Chinner <david@fromorbit.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
---

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