From: Brian Foster <bfoster@redhat.com>
Date: Thu, 24 Apr 2014 06:00:53 +0000 (+1000)
Subject: xfs: use and update the finobt on inode allocation
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~55^2~6^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6dd8638e4e8764e0d6557fc62840a815a99c136d;p=pandora-kernel.git

xfs: use and update the finobt on inode allocation

Replace xfs_dialloc_ag() with an implementation that looks for a
record in the finobt. The finobt only tracks records with at least
one free inode. This eliminates the need for the intra-ag scan in
the original algorithm. Once the inode is allocated, update the
finobt appropriately (possibly removing the record) as well as the
inobt.

Move the original xfs_dialloc_ag() algorithm to
xfs_dialloc_ag_inobt() and fall back as such if finobt support is
not enabled.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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