Jaegeuk Kim
216fbd6443
f2fs: introduce sysfs entry to control in-place-update policy ...
This patch introduces new sysfs entries for users to control the policy of
in-place-updates, namely IPU, in f2fs.
Sometimes f2fs suffers from performance degradation due to its out-of-place
update policy that produces many additional node block writes.
If the storage performance is very dependant on the amount of data writes
instead of IO patterns, we'd better drop this out-of-place update policy.
This patch suggests 5 polcies and their triggering conditions as follows.
[sysfs entry name = ipu_policy]
0: F2FS_IPU_FORCE all the time,
1: F2FS_IPU_SSR if SSR mode is activated,
2: F2FS_IPU_UTIL if FS utilization is over threashold,
3: F2FS_IPU_SSR_UTIL if SSR mode is activated and FS utilization is over
threashold,
4: F2FS_IPU_DISABLE disable IPU. (=default option)
[sysfs entry name = 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.
For more details, see need_inplace_update() in segment.h.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23 10:18:07 +09:00
FS-Cache: Provide the ability to enable/disable cookies
2013-09-27 18:40:25 +01:00
cifs: update cifs.txt and remove some outdated infos
2013-09-13 16:29:58 -05:00
configfs: convert to umode_t
2012-01-03 22:54:57 -05:00
doc: filesystems : Fix typo in Documentations/filesystems
2013-08-20 13:45:56 +02:00
Documentation: Fix multiple typo in Documentation
2012-03-07 16:08:24 +01:00
Introduce a new file system, Flash-Friendly File System (F2FS), to Linux 3.8.
2012-12-20 13:54:52 -08:00
9p: fix 9p.txt to advertise msize instead of maxdata
2011-10-24 11:13:12 -05:00
adfs: add hexadecimal filetype suffix option
2011-03-22 17:44:17 -07:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Documentation: befs.txt: no maintainer, orphaned
2011-08-13 18:34:03 -07:00
Documentation: filesystems: update btrfs tools section
2013-11-21 11:51:50 -05:00
ceph: enable/disable dentry complete flags via mount option
2012-01-12 11:00:40 -08:00
debugfs: more tightly restrict default mount mode
2012-08-27 13:42:02 -07:00
vfs: take i_mutex on renamed file
2013-11-09 00:16:40 -05:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Documentation/fs/: split txt and source files
2010-03-12 15:52:35 -08:00
Documentation/fs/: split txt and source files
2010-03-12 15:52:35 -08:00
efivarfs: Add documentation for the EFI variable filesystem
2012-10-30 10:39:18 +00:00
exofs: Add option to mount by osdname
2011-03-15 15:02:51 +02:00
ext3: allow specifying external journal by pathname mount option
2013-07-31 22:11:15 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
f2fs: introduce sysfs entry to control in-place-update policy
2013-12-23 10:18:07 +09:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Wrap accesses to the fd_sets in struct fdtable
2012-02-19 10:30:52 -08:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
GFS2: Update glock doc to add new stats info
2012-05-10 12:41:40 +01:00
Documentation: Fix multiple typo in Documentation
2012-03-07 16:08:24 +01:00
GFS2: Update main gfs2 doc
2012-05-10 11:45:31 +01:00
Documentation: HFS is orphaned
2011-11-04 12:01:48 -07:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Documentation: fix inotify source file paths
2011-11-04 12:01:47 -07:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
doc: fix misspellings with 'codespell' tool
2013-05-28 12:02:12 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-07-03 09:10:19 -07:00
doc: fix broken references
2011-09-27 18:08:04 +02:00
fix "seperate" typos in comments
2010-05-10 11:56:30 +02:00
Documentation/fs/: split txt and source files
2010-03-12 15:52:35 -08:00
nilfs2: remove resize from unsupported features list
2011-07-13 16:08:59 +09:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
ocfs2: clean up mount option about atime in ocfs2.txt
2011-05-23 23:37:12 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
iget/iget5: don't bother with ->i_lock until we find a match
2013-11-09 00:16:31 -05:00
/proc/pid/smaps: show VM_SOFTDIRTY flag in VmFlags line
2013-11-13 12:09:07 +09:00
doc: filesystems : Fix typo in Documentations/filesystems
2013-08-20 13:45:56 +02:00
initmpfs: use initramfs if rootfstype= or root= specified
2013-09-11 15:59:38 -07:00
doc: Fix typo in doucmentations
2013-07-25 12:34:15 +02:00
Documentation/filesystems/romfs.txt: fixing link to genromfs
2011-02-17 22:04:46 +01:00
seq_file: use proc_create() in documentation
2009-12-16 07:20:07 -08:00
Documentation: Fix trivial typo in filesystems/sharedsubtree.txt
2010-10-25 21:18:21 -04:00
Squashfs: Update documentation to include xattrs
2011-12-30 01:20:24 +00:00
PCI: Allow read/write access to sysfs I/O port resources
2010-07-30 09:32:08 -07:00
doc: Fix typo in doucmentations
2013-07-25 12:34:15 +02:00
sysfs: propagate umode_t
2012-01-03 22:55:03 -05:00
mempolicy: document cpuset interaction with tmpfs mpol mount option
2010-05-25 08:06:57 -07:00
UBIFS: switch self-check knobs to debugfs
2011-07-04 10:54:28 +03:00
Documentation/filesystems/vfat.txt: fix directory entry example
2013-11-13 12:09:32 +09:00
vfs: improve i_op->atomic_open() documentation
2013-09-16 19:17:24 -04:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
xfs: add metadata CRC documentation
2013-04-27 13:27:43 -05:00
doc: filesystems : Fix typo in Documentations/filesystems
2013-08-20 13:45:56 +02:00
216fbd6443