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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-23 09:21:09 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-23 09:21:09 -0800 |
commit | 0d90d638720ba14874e34cbd8766e4dc3f14f458 (patch) | |
tree | 5080f0335c1454ae6a3ef6b29834af20ae08a952 /Documentation/filesystems | |
parent | 1d32bdafaaa8bcc4c39b41ab9f674887d147f188 (diff) | |
parent | bf39c00a9a7f3cdb5ce7d6695d9f044daf8f0b53 (diff) | |
download | op-kernel-dev-0d90d638720ba14874e34cbd8766e4dc3f14f458.zip op-kernel-dev-0d90d638720ba14874e34cbd8766e4dc3f14f458.tar.gz |
Merge tag 'for-f2fs-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs updates from Jaegeuk Kim:
"In this round, a couple of sysfs entries were introduced to tune the
f2fs at runtime.
In addition, f2fs starts to support inline_data and improves the
read/write performance in some workloads by refactoring bio-related
flows.
This patch-set includes the following major enhancement patches.
- support inline_data
- refactor bio operations such as merge operations and rw type
assignment
- enhance the direct IO path
- enhance bio operations
- truncate a node page when it becomes obsolete
- add sysfs entries: small_discards, max_victim_search, and
in-place-update
- add a sysfs entry to control max_victim_search
The other bug fixes are as follows.
- fix a bug in truncate_partial_nodes
- avoid warnings during sparse and build process
- fix error handling flows
- fix potential bit overflows
And, there are a bunch of cleanups"
* tag 'for-f2fs-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (95 commits)
f2fs: drop obsolete node page when it is truncated
f2fs: introduce NODE_MAPPING for code consistency
f2fs: remove the orphan block page array
f2fs: add help function META_MAPPING
f2fs: move a branch for code redability
f2fs: call mark_inode_dirty to flush dirty pages
f2fs: clean checkpatch warnings
f2fs: missing REQ_META and REQ_PRIO when sync_meta_pages(META_FLUSH)
f2fs: avoid f2fs_balance_fs call during pageout
f2fs: add delimiter to seperate name and value in debug phrase
f2fs: use spinlock rather than mutex for better speed
f2fs: move alloc new orphan node out of lock protection region
f2fs: move grabing orphan pages out of protection region
f2fs: remove the needless parameter of f2fs_wait_on_page_writeback
f2fs: update documents and a MAINTAINERS entry
f2fs: add a sysfs entry to control max_victim_search
f2fs: improve write performance under frequent fsync calls
f2fs: avoid to read inline data except first page
f2fs: avoid to left uninitialized data in page when read inline data
f2fs: fix truncate_partial_nodes bug
...
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r-- | Documentation/filesystems/f2fs.txt | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index a3fe811..b8d2849 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -120,6 +120,8 @@ active_logs=%u Support configuring the number of active logs. In the disable_ext_identify Disable the extension list configured by mkfs, so f2fs does not aware of cold files such as media files. 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. ================================================================================ DEBUGFS ENTRIES @@ -171,6 +173,28 @@ Files in /sys/fs/f2fs/<devname> conduct checkpoint to reclaim the prefree segments to free segments. By default, 100 segments, 200MB. + max_small_discards This parameter controls the number of discard + commands that consist small blocks less than 2MB. + The candidates to be discarded are cached until + checkpoint is triggered, and issued during the + checkpoint. By default, it is disabled with 0. + + 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. + + 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. + + 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 + which covers 8GB block address range. + ================================================================================ USAGE ================================================================================ |