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ext4: Use high 16 bits of the block group descriptor's free counts fields

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Rename the lower bits with suffix _lo and add helper
to access the values. Also rename bg_itable_unused_hi
to bg_pad as in e2fsprogs.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Aneesh Kumar K.V
2009-01-05 22:20:24 -05:00
committed by Theodore Ts'o
parent e8134b27e3
commit 560671a0d3
7 changed files with 149 additions and 62 deletions
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15
fs/ext4/mballoc.c
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@ -2515,7 +2515,7 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
ext4_free_blocks_after_init(sb, group, desc);
} else {
meta_group_info[i]->bb_free =
le16_to_cpu(desc->bg_free_blocks_count);
ext4_free_blks_count(sb, desc);
}
INIT_LIST_HEAD(&meta_group_info[i]->bb_prealloc_list);
@ -3046,12 +3046,12 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
ac->ac_b_ex.fe_start, ac->ac_b_ex.fe_len);
if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
gdp->bg_free_blocks_count =
cpu_to_le16(ext4_free_blocks_after_init(sb,
ac->ac_b_ex.fe_group,
gdp));
ext4_free_blks_set(sb, gdp,
ext4_free_blocks_after_init(sb,
ac->ac_b_ex.fe_group, gdp));
}
le16_add_cpu(&gdp->bg_free_blocks_count, -ac->ac_b_ex.fe_len);
len = ext4_free_blks_count(sb, gdp) - ac->ac_b_ex.fe_len;
ext4_free_blks_set(sb, gdp, len);
gdp->bg_checksum = ext4_group_desc_csum(sbi, ac->ac_b_ex.fe_group, gdp);
spin_unlock(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group));
percpu_counter_sub(&sbi->s_freeblocks_counter, ac->ac_b_ex.fe_len);
@ -4823,7 +4823,8 @@ do_more:
}
spin_lock(sb_bgl_lock(sbi, block_group));
le16_add_cpu(&gdp->bg_free_blocks_count, count);
ret = ext4_free_blks_count(sb, gdp) + count;
ext4_free_blks_set(sb, gdp, ret);
gdp->bg_checksum = ext4_group_desc_csum(sbi, block_group, gdp);
spin_unlock(sb_bgl_lock(sbi, block_group));
percpu_counter_add(&sbi->s_freeblocks_counter, count);