linux-ext4 - [PATCH] ext3: remove max_debt in find_group

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Message-ID: <4F71679C.7080401@rs.jp.nec.com>
Date:	Tue, 27 Mar 2012 16:09:16 +0900
From:	Akira Fujita <a-fujita@...jp.nec.com>
To:	Jan Kara <jack@...e.cz>
CC:	ext4 development <linux-ext4@...r.kernel.org>
Subject: [PATCH] ext3: remove max_debt in find_group_orlov()

max_debt, involved variables and calculations
are no longer needed, clean them up.

Signed-off-by: Akira Fujita <a-fujita@...jp.nec.com>
---
 fs/ext3/ialloc.c |   20 ++------------------
 1 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c
index 1cde284..8bc04e6 100644
--- a/fs/ext3/ialloc.c
+++ b/fs/ext3/ialloc.c
@@ -191,8 +191,7 @@ error_return:
  * It's OK to put directory into a group unless
  * it has too many directories already (max_dirs) or
  * it has too few free inodes left (min_inodes) or
- * it has too few free blocks left (min_blocks) or
- * it's already running too large debt (max_debt).
+ * it has too few free blocks left (min_blocks).
  * Parent's group is preferred, if it doesn't satisfy these
  * conditions we search cyclically through the rest. If none
  * of the groups look good we just look for a group with more
@@ -202,21 +201,16 @@ error_return:
  * when we allocate an inode, within 0--255.
  */
 
-#define INODE_COST 64
-#define BLOCK_COST 256
-
 static int find_group_orlov(struct super_block *sb, struct inode *parent)
 {
 	int parent_group = EXT3_I(parent)->i_block_group;
 	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	struct ext3_super_block *es = sbi->s_es;
 	int ngroups = sbi->s_groups_count;
 	int inodes_per_group = EXT3_INODES_PER_GROUP(sb);
 	unsigned int freei, avefreei;
 	ext3_fsblk_t freeb, avefreeb;
-	ext3_fsblk_t blocks_per_dir;
 	unsigned int ndirs;
-	int max_debt, max_dirs, min_inodes;
+	int max_dirs, min_inodes;
 	ext3_grpblk_t min_blocks;
 	int group = -1, i;
 	struct ext3_group_desc *desc;
@@ -253,20 +247,10 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
 		goto fallback;
 	}
 
-	blocks_per_dir = (le32_to_cpu(es->s_blocks_count) - freeb) / ndirs;
-
 	max_dirs = ndirs / ngroups + inodes_per_group / 16;
 	min_inodes = avefreei - inodes_per_group / 4;
 	min_blocks = avefreeb - EXT3_BLOCKS_PER_GROUP(sb) / 4;
 
-	max_debt = EXT3_BLOCKS_PER_GROUP(sb) / max(blocks_per_dir, (ext3_fsblk_t)BLOCK_COST);
-	if (max_debt * INODE_COST > inodes_per_group)
-		max_debt = inodes_per_group / INODE_COST;
-	if (max_debt > 255)
-		max_debt = 255;
-	if (max_debt == 0)
-		max_debt = 1;
-
 	for (i = 0; i < ngroups; i++) {
 		group = (parent_group + i) % ngroups;
 		desc = ext3_get_group_desc (sb, group, NULL);
--
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