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| author | Chao Yu <yuchao0@huawei.com> | 2017-03-23 13:38:26 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-03-24 15:10:53 -0400 |
| commit | 22588f8773f687449ce6e97dce9f102553440d30 (patch) | |
| tree | 4b3fe264daaf5151bf5d3b6dd509f155ff73a4a1 /fs/f2fs/xattr.h | |
| parent | 89e9eabd7ded4680f3b0f8ddc7398a3909de57c8 (diff) | |
| download | linux-22588f8773f687449ce6e97dce9f102553440d30.tar.gz linux-22588f8773f687449ce6e97dce9f102553440d30.tar.bz2 linux-22588f8773f687449ce6e97dce9f102553440d30.zip | |
f2fs: don't reserve additional space in xattr block
In this patch, we change xattr block disk layout as below:
Before:
xattr node block layout
+---------------------------------------------+---------------+-------------+
| node block xattr entries | reserved | node footer |
| 4068 Bytes | 4 Bytes | 24 Bytes |
In memory layout
+--------------------+---------------------------------+--------------------+
| inline xattr | node block xattr entries | reserved |
| 200 Bytes | 4068 Bytes | 4 Bytes |
After:
xattr node block layout
+-------------------------------------------------------------+-------------+
| node block xattr entries | node footer |
| 4072 Bytes | 24 Bytes |
In memory layout
+--------------------+---------------------------------+--------------------+
| inline xattr | node block xattr entries | reserved |
| 200 Bytes | 4072 Bytes | 4 Bytes |
With this change, we don't need to reserve additional space in node block,
just keep reserved space in logical in-memory layout. So that it would help
to enlarge valid free space of xattr node block.
As tested, generic/026 shows max stored xattr entires number increases from
531 to 532 when inline_xattr option is enabled.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/xattr.h')
| -rw-r--r-- | fs/f2fs/xattr.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h index 1e7db8d0806e..6afcee35ebeb 100644 --- a/fs/f2fs/xattr.h +++ b/fs/f2fs/xattr.h @@ -72,9 +72,8 @@ struct f2fs_xattr_entry { for (entry = XATTR_FIRST_ENTRY(addr);\ !IS_XATTR_LAST_ENTRY(entry);\ entry = XATTR_NEXT_ENTRY(entry)) -#define MAX_XATTR_BLOCK_SIZE (PAGE_SIZE - sizeof(struct node_footer)) -#define RESERVED_XATTR_SIZE (sizeof(__u32)) -#define VALID_XATTR_BLOCK_SIZE (MAX_XATTR_BLOCK_SIZE - RESERVED_XATTR_SIZE) +#define VALID_XATTR_BLOCK_SIZE (PAGE_SIZE - sizeof(struct node_footer)) +#define XATTR_PADDING_SIZE (sizeof(__u32)) #define MIN_OFFSET(i) XATTR_ALIGN(inline_xattr_size(i) + \ VALID_XATTR_BLOCK_SIZE) |