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| H A D | xattr.h | diff 22588f8773f687449ce6e97dce9f102553440d30 Thu Mar 23 06:38:26 CET 2017 Chao Yu <yuchao0@huawei.com> 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>
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