diff options
| author | Daeho Jeong <daehojeong@google.com> | 2025-03-11 11:29:31 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2025-03-13 18:15:59 +0000 |
| commit | d7b549def0eb42a950eebd3bd5343f5c8088c305 (patch) | |
| tree | a2d5786404c7189ccbdf7ef366245573339af805 /Documentation | |
| parent | f7f8932ca6bb22494ef6db671633ad3b4d982271 (diff) | |
f2fs: add carve_out sysfs node
For several zoned storage devices, vendors will provide extra space
which was used for device level GC than specs and F2FS can use this
space for filesystem level GC. To do that, we can reserve the space
using reserved_blocks. However, it is not enough, since this extra
space should not be shown to users. So, with this new sysfs node,
we can hide the space by substracting reserved_blocks from total
bytes.
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index b9a000e5098a..2c85c6b8da8d 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -836,3 +836,13 @@ Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> Description: It reclaims the given KBs of file-backed pages registered by ioctl(F2FS_IOC_DONATE_RANGE). For example, writing N tries to drop N KBs spaces in LRU. + +What: /sys/fs/f2fs/<disk>/carve_out +Date: March 2025 +Contact: "Daeho Jeong" <daehojeong@google.com> +Description: For several zoned storage devices, vendors will provide extra space which + was used for device level GC than specs and F2FS can use this space for + filesystem level GC. To do that, we can reserve the space using + reserved_blocks. However, it is not enough, since this extra space should + not be shown to users. So, with this new sysfs node, we can hide the space + by substracting reserved_blocks from total bytes. |