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| author | Chao Yu <yuchao0@huawei.com> | 2018-02-28 17:07:27 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-13 08:05:57 +0900 |
| commit | b6a06cbbb5f7fd03589cff9178314af04c568826 (patch) | |
| tree | e9e782bd93dc91a35aeb9af8f74c7e82fb47b8bb /Documentation/ABI | |
| parent | 1dc0f8991d4d93194fb7a3ac3164e05e8b24ad02 (diff) | |
| download | op-kernel-dev-b6a06cbbb5f7fd03589cff9178314af04c568826.zip op-kernel-dev-b6a06cbbb5f7fd03589cff9178314af04c568826.tar.gz | |
f2fs: support hot file extension
This patch supports to recognize hot file extension in f2fs, so that we
can allocate proper hot segment location for its data, which can lead to
better hot/cold seperation in filesystem.
In addition, we changes a bit on query/add/del operation method for
extension_list sysfs entry as below:
- Query: cat /sys/fs/f2fs/<disk>/extension_list
- Add: echo 'extension' > /sys/fs/f2fs/<disk>/extension_list
- Del: echo '!extension' > /sys/fs/f2fs/<disk>/extension_list
- Add: echo '[h/c]extension' > /sys/fs/f2fs/<disk>/extension_list
- Del: echo '[h/c]!extension' > /sys/fs/f2fs/<disk>/extension_list
- [h] means add/del hot file extension
- [c] means add/del cold file extension
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 7fa84e3..540553c 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -199,5 +199,7 @@ Contact: "Chao Yu" <yuchao0@huawei.com> Description: Used to control configure extension list: - Query: cat /sys/fs/f2fs/<disk>/extension_list - - Add: echo 'extension' > /sys/fs/f2fs/<disk>/extension_list - - Del: echo '!extension' > /sys/fs/f2fs/<disk>/extension_list + - Add: echo '[h/c]extension' > /sys/fs/f2fs/<disk>/extension_list + - Del: echo '[h/c]!extension' > /sys/fs/f2fs/<disk>/extension_list + - [h] means add/del hot file extension + - [c] means add/del cold file extension |
