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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-12-03 18:52:45 +0100 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-12-07 17:41:25 +0100 |
| commit | 10208567f11bd572331cbbcb9a89c61a143811a1 (patch) | |
| tree | 5dcbe4ab3295300d06b1bae47b31ebb40e5d5c20 /Documentation/ABI | |
| parent | f2fs: don't allow any writes on readonly mount (diff) | |
| download | linux-10208567f11bd572331cbbcb9a89c61a143811a1.tar.xz linux-10208567f11bd572331cbbcb9a89c61a143811a1.zip | |
f2fs: introduce max_io_bytes, a sysfs entry, to limit bio size
This patch adds max_io_bytes to limit bio size when f2fs tries to merge
consecutive IOs. This can give a testing point to split out bios and check
end_io handles those bios correctly. This is used to capture a recent bug
on the decompression and fsverity flow.
Reviewed-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 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 67b3ed8e8c2f..3dfee94e0618 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -370,3 +370,10 @@ Date: April 2020 Contact: "Daeho Jeong" <daehojeong@google.com> Description: Give a way to change iostat_period time. 3secs by default. The new iostat trace gives stats gap given the period. +What: /sys/fs/f2fs/<disk>/max_io_bytes +Date: December 2020 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: This gives a control to limit the bio size in f2fs. + Default is zero, which will follow underlying block layer limit, + whereas, if it has a certain bytes value, f2fs won't submit a + bio larger than that size. |