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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 | |
| parent | 89e9eabd7ded4680f3b0f8ddc7398a3909de57c8 (diff) | |
| download | linux-22588f8773f687449ce6e97dce9f102553440d30.tar.bz2 | |
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>
| -rw-r--r-- | fs/f2fs/xattr.c | 6 | ||||
| -rw-r--r-- | fs/f2fs/xattr.h | 5 |
2 files changed, 5 insertions, 6 deletions
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index 528aed399814..832c5110abab 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -256,7 +256,7 @@ static int lookup_all_xattrs(struct inode *inode, struct page *ipage, if (!size && !inline_size) return -ENODATA; - txattr_addr = kzalloc(inline_size + size + RESERVED_XATTR_SIZE, + txattr_addr = kzalloc(inline_size + size + XATTR_PADDING_SIZE, GFP_F2FS_ZERO); if (!txattr_addr) return -ENOMEM; @@ -332,7 +332,7 @@ static int read_all_xattrs(struct inode *inode, struct page *ipage, void *txattr_addr; int err; - txattr_addr = kzalloc(inline_size + size + RESERVED_XATTR_SIZE, + txattr_addr = kzalloc(inline_size + size + XATTR_PADDING_SIZE, GFP_F2FS_ZERO); if (!txattr_addr) return -ENOMEM; @@ -451,7 +451,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize, } xattr_addr = page_address(xpage); - memcpy(xattr_addr, txattr_addr + inline_size, MAX_XATTR_BLOCK_SIZE); + memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE); set_page_dirty(xpage); f2fs_put_page(xpage, 1); 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) |