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Diffstat (limited to 'Documentation/filesystems/f2fs.txt')
| -rw-r--r-- | Documentation/filesystems/f2fs.txt | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index a2046a7d0a9d..e0950c483c22 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -122,6 +122,10 @@ disable_ext_identify Disable the extension list configured by mkfs, so f2fs inline_xattr Enable the inline xattrs feature. inline_data Enable the inline data feature: New created small(<~3.4k) files can be written into inode block. +inline_dentry Enable the inline dir feature: data in new created + directory entries can be written into inode block. The + space of inode block which is used to store inline + dentries is limited to ~3.4k. flush_merge Merge concurrent cache_flush commands as much as possible to eliminate redundant command issues. If the underlying device handles the cache_flush command relatively slowly, @@ -131,6 +135,9 @@ nobarrier This option can be used if underlying storage guarantees If this option is set, no cache_flush commands are issued but f2fs still guarantees the write ordering of all the data writes. +fastboot This option is used when a system wants to reduce mount + time as much as possible, even though normal performance + can be sacrificed. ================================================================================ DEBUGFS ENTRIES @@ -192,15 +199,22 @@ Files in /sys/fs/f2fs/<devname> ipu_policy This parameter controls the policy of in-place updates in f2fs. There are five policies: - 0: F2FS_IPU_FORCE, 1: F2FS_IPU_SSR, - 2: F2FS_IPU_UTIL, 3: F2FS_IPU_SSR_UTIL, - 4: F2FS_IPU_DISABLE. + 0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR, + 0x04: F2FS_IPU_UTIL, 0x08: F2FS_IPU_SSR_UTIL, + 0x10: F2FS_IPU_FSYNC. min_ipu_util This parameter controls the threshold to trigger in-place-updates. The number indicates percentage of the filesystem utilization, and used by F2FS_IPU_UTIL and F2FS_IPU_SSR_UTIL policies. + min_fsync_blocks This parameter controls the threshold to trigger + in-place-updates when F2FS_IPU_FSYNC mode is set. + The number indicates the number of dirty pages + when fsync needs to flush on its call path. If + the number is less than this value, it triggers + in-place-updates. + max_victim_search This parameter controls the number of trials to find a victim segment when conducting SSR and cleaning operations. The default value is 4096 |