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| author | Chris Mason <chris.mason@oracle.com> | 2011-05-24 15:35:30 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-05-26 17:52:15 -0400 |
| commit | 4cb5300bc839b8a943eb19c9f27f25470e22d0ca (patch) | |
| tree | ac0f2fb481c7aa6af08a624d276fa6d580c94c9b /fs/btrfs/inode.c | |
| parent | d6c0cb379c5198487e4ac124728cbb2346d63b1f (diff) | |
| download | kernel_samsung_smdk4412-4cb5300bc839b8a943eb19c9f27f25470e22d0ca.zip kernel_samsung_smdk4412-4cb5300bc839b8a943eb19c9f27f25470e22d0ca.tar.gz kernel_samsung_smdk4412-4cb5300bc839b8a943eb19c9f27f25470e22d0ca.tar.bz2 | |
Btrfs: add mount -o auto_defrag
This will detect small random writes into files and
queue the up for an auto defrag process. It isn't well suited to
database workloads yet, but works for smaller files such as rpm, sqlite
or bdb databases.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index d378f8b..bb51bb1 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -342,6 +342,10 @@ static noinline int compress_file_range(struct inode *inode, int will_compress; int compress_type = root->fs_info->compress_type; + /* if this is a small write inside eof, kick off a defragbot */ + if (end <= BTRFS_I(inode)->disk_i_size && (end - start + 1) < 16 * 1024) + btrfs_add_inode_defrag(NULL, inode); + actual_end = min_t(u64, isize, end + 1); again: will_compress = 0; @@ -799,6 +803,10 @@ static noinline int cow_file_range(struct inode *inode, disk_num_bytes = num_bytes; ret = 0; + /* if this is a small write inside eof, kick off defrag */ + if (end <= BTRFS_I(inode)->disk_i_size && num_bytes < 64 * 1024) + btrfs_add_inode_defrag(trans, inode); + if (start == 0) { /* lets try to make an inline extent */ ret = cow_file_range_inline(trans, root, inode, @@ -5371,6 +5379,9 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode, if (IS_ERR(trans)) return ERR_CAST(trans); + if (start <= BTRFS_I(inode)->disk_i_size && len < 64 * 1024) + btrfs_add_inode_defrag(trans, inode); + trans->block_rsv = &root->fs_info->delalloc_block_rsv; alloc_hint = get_extent_allocation_hint(inode, start, len); @@ -6682,6 +6693,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) ei->ordered_data_close = 0; ei->orphan_meta_reserved = 0; ei->dummy_inode = 0; + ei->in_defrag = 0; ei->force_compress = BTRFS_COMPRESS_NONE; ei->delayed_node = NULL; |