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authorJoel Becker <joel.becker@oracle.com>2010-03-26 10:09:29 +0800
committerTao Ma <tao.ma@oracle.com>2010-03-26 10:09:29 +0800
commit8b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86 (patch)
treeb05dc205b03329aa3e0c0963b76317fc91973a04 /fs/ocfs2/journal.h
parent2b6cb576aa80611f1f6a3c88708d1e68a8d97985 (diff)
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ocfs2: Grow discontig block groups in one transaction.
Rather than extending the transaction every time we add an extent to a discontiguous block group, we grab enough credits to fill the extent list up front. This means we can free the bits in the same transaction if we end up not getting enough space. Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/journal.h')
-rw-r--r--fs/ocfs2/journal.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index 7dc56561..b5baaa8 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -561,6 +561,18 @@ static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb,
return blocks;
}
+/*
+ * Allocating a discontiguous block group requires the credits from
+ * ocfs2_calc_group_alloc_credits() as well as enough credits to fill
+ * the group descriptor's extent list. The caller already has started
+ * the transaction with ocfs2_calc_group_alloc_credits(). They extend
+ * it with these credits.
+ */
+static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb)
+{
+ return ocfs2_extent_recs_per_gd(sb);
+}
+
static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb,
unsigned int clusters_to_del,
struct ocfs2_dinode *fe,
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