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| author | Liao Yuanhong <liaoyuanhong@vivo.com> | 2024-07-15 14:34:51 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2024-08-05 22:18:35 +0200 |
| commit | 8444ce524947daf441546b5b3a0c418706dade35 (patch) | |
| tree | aa6df60e452d1143212db34287bdeac3582d1948 /Documentation/ABI | |
| parent | f2fs: avoid potential int overflow in sanity_check_area_boundary() (diff) | |
| download | linux-8444ce524947daf441546b5b3a0c418706dade35.tar.xz linux-8444ce524947daf441546b5b3a0c418706dade35.zip | |
f2fs: add write priority option based on zone UFS
Currently, we are using a mix of traditional UFS and zone UFS to support
some functionalities that cannot be achieved on zone UFS alone. However,
there are some issues with this approach. There exists a significant
performance difference between traditional UFS and zone UFS. Under normal
usage, we prioritize writes to zone UFS. However, in critical conditions
(such as when the entire UFS is almost full), we cannot determine whether
data will be written to traditional UFS or zone UFS. This can lead to
significant performance fluctuations, which is not conducive to
development and testing. To address this, we have added an option
zlu_io_enable under sys with the following three modes:
1) zlu_io_enable == 0:Normal mode, prioritize writing to zone UFS;
2) zlu_io_enable == 1:Zone UFS only mode, only allow writing to zone UFS;
3) zlu_io_enable == 2:Traditional UFS priority mode, prioritize writing to
traditional UFS.
Signed-off-by: Liao Yuanhong <liaoyuanhong@vivo.com>
Signed-off-by: Wu Bo <bo.wu@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index cad6c3dc1f9c..3500920ab7ce 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -763,3 +763,17 @@ Date: November 2023 Contact: "Chao Yu" <chao@kernel.org> Description: It controls to enable/disable IO aware feature for background discard. By default, the value is 1 which indicates IO aware is on. + +What: /sys/fs/f2fs/<disk>/blkzone_alloc_policy +Date: July 2024 +Contact: "Yuanhong Liao" <liaoyuanhong@vivo.com> +Description: The zone UFS we are currently using consists of two parts: + conventional zones and sequential zones. It can be used to control which part + to prioritize for writes, with a default value of 0. + + ======================== ========================================= + value description + blkzone_alloc_policy = 0 Prioritize writing to sequential zones + blkzone_alloc_policy = 1 Only allow writing to sequential zones + blkzone_alloc_policy = 2 Prioritize writing to conventional zones + ======================== ========================================= |