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[PATCH] ext4: fix credit calculation in ext4_ext_calc_credits_for_insert 

Fix a nit in ext4_ext_calc_credits_for_insert().  Besides, credits for the
new root are already added in the index split accounting.

Signed-off-by: Johann Lombardi <johann.lombardi@bull.net>
Signed-off-by: Alex Tomas <alex@clusterfs.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Johann Lombardi 2006-12-06 20:40:46 -08:00 committed by Linus Torvalds
parent 97d2a80584
commit feb1892746
1 changed files with 4 additions and 3 deletions
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7
fs/ext4/extents.c
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@ -1531,16 +1531,17 @@ int inline ext4_ext_calc_credits_for_insert(struct inode *inode,
/*
* tree can be full, so it would need to grow in depth:
* allocation + old root + new root
* we need one credit to modify old root, credits for
* new root will be added in split accounting
*/
needed += 2 + 1 + 1;
needed += 1;
/*
* Index split can happen, we would need:
* allocate intermediate indexes (bitmap + group)
* + change two blocks at each level, but root (already included)
*/
needed = (depth * 2) + (depth * 2);
needed += (depth * 2) + (depth * 2);
/* any allocation modifies superblock */
needed += 1;