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authorChristoph Hellwig <hch@infradead.org>2012-08-07 02:02:02 -0400
committerBen Myers <bpm@sgi.com>2012-08-16 16:23:59 -0500
commitc4982110ae93d7575503feb81d15e93c0c5f393c (patch)
treecec67f22d5f73e77370cad8b23a41ea7ecbb0e39 /fs/xfs
parent1ed845df60f3f02d4b7cd9fcad79ccb69c289f5c (diff)
downloadop-kernel-dev-c4982110ae93d7575503feb81d15e93c0c5f393c.zip
op-kernel-dev-c4982110ae93d7575503feb81d15e93c0c5f393c.tar.gz
xfs: unlock the AGI buffer when looping in xfs_dialloc
Also update some commens in the area to make the code easier to read. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_ialloc.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index 21e37b5..5aceb3f 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -962,23 +962,22 @@ xfs_dialloc(
if (!pag->pagi_freecount && !okalloc)
goto nextag;
+ /*
+ * Then read in the AGI buffer and recheck with the AGI buffer
+ * lock held.
+ */
error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
if (error)
goto out_error;
- /*
- * Once the AGI has been read in we have to recheck
- * pagi_freecount with the AGI buffer lock held.
- */
if (pag->pagi_freecount) {
xfs_perag_put(pag);
goto out_alloc;
}
- if (!okalloc) {
- xfs_trans_brelse(tp, agbp);
- goto nextag;
- }
+ if (!okalloc)
+ goto nextag_relse_buffer;
+
error = xfs_ialloc_ag_alloc(tp, agbp, &ialloced);
if (error) {
@@ -1007,6 +1006,8 @@ xfs_dialloc(
return 0;
}
+nextag_relse_buffer:
+ xfs_trans_brelse(tp, agbp);
nextag:
xfs_perag_put(pag);
if (++agno == mp->m_sb.sb_agcount)
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