diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 4 | ||||
| -rw-r--r-- | Documentation/filesystems/f2fs.rst | 6 |
2 files changed, 7 insertions, 3 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 4bb93a06d8ab..7f730c4c8df2 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -229,7 +229,9 @@ Date: August 2017 Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> Description: Do background GC agressively when set. When gc_urgent = 1, background thread starts to do GC by given gc_urgent_sleep_time - interval. It is set to 0 by default. + interval. When gc_urgent = 2, F2FS will lower the bar of + checking idle in order to process outstanding discard commands + and GC a little bit aggressively. It is set to 0 by default. What: /sys/fs/f2fs/<disk>/gc_urgent_sleep_time Date: August 2017 diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index a11d329542f9..ec8d99703ecb 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -258,6 +258,8 @@ compress_extension=%s Support adding specified extension, so that f2fs can enab on compression extension list and enable compression on these file by default rather than to enable it via ioctl. For other files, we can still enable compression via ioctl. + Note that, there is one reserved special extension '*', it + can be set to enable compression for all files. inlinecrypt When possible, encrypt/decrypt the contents of encrypted files using the blk-crypto framework rather than filesystem-layer encryption. This allows the use of @@ -743,8 +745,8 @@ Compression implementation - In order to eliminate write amplification during overwrite, F2FS only support compression on write-once file, data can be compressed only when - all logical blocks in file are valid and cluster compress ratio is lower - than specified threshold. + all logical blocks in cluster contain valid data and compress ratio of + cluster data is lower than specified threshold. - To enable compression on regular inode, there are three ways: |