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linux-next/Documentation/filesystems
Andreas Rohner 2cc88f3a5f nilfs2: implementation of NILFS_IOCTL_SET_SUINFO ioctl
With this ioctl the segment usage entries in the SUFILE can be updated
from userspace.

This is useful, because it allows the userspace GC to modify and update
segment usage entries for specific segments, which enables it to avoid
unnecessary write operations.

If a segment needs to be cleaned, but there is no or very little
reclaimable space in it, the cleaning operation basically degrades to a
useless moving operation.  In the end the only thing that changes is the
location of the data and a timestamp in the segment usage information.
With this ioctl the GC can skip the cleaning and update the segment
usage entries directly instead.

This is basically a shortcut to cleaning the segment.  It is still
necessary to read the segment summary information, but the writing of
the live blocks can be skipped if it's not worth it.

[konishi.ryusuke@lab.ntt.co.jp: add description of NILFS_IOCTL_SET_SUINFO ioctl]
Signed-off-by: Andreas Rohner <andreas.rohner@gmx.net>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-03 16:21:25 -07:00
..
caching FS-Cache: Provide the ability to enable/disable cookies 2013-09-27 18:40:25 +01:00
cifs cifs: update cifs.txt and remove some outdated infos 2013-09-13 16:29:58 -05:00
configfs configfs: convert to umode_t 2012-01-03 22:54:57 -05:00
nfs Documentation/: update 00-INDEX files 2014-02-10 16:01:40 -08:00
pohmelfs Documentation: Fix multiple typo in Documentation 2012-03-07 16:08:24 +01:00
9p.txt 9p: update documentation 2014-01-24 10:55:21 -06:00
00-INDEX Documentation/: update 00-INDEX files 2014-02-10 16:01:40 -08:00
adfs.txt adfs: add hexadecimal filetype suffix option 2011-03-22 17:44:17 -07:00
affs.txt Documentation: update broken web addresses. 2010-08-04 15:21:40 +02:00
afs.txt
autofs4-mount-control.txt doc: fix double words 2014-03-21 13:16:58 +01:00
automount-support.txt
befs.txt Documentation: befs.txt: no maintainer, orphaned 2011-08-13 18:34:03 -07:00
bfs.txt
btrfs.txt btrfs: Add treelog mount option. 2014-01-28 13:20:20 -08:00
ceph.txt ceph: enable/disable dentry complete flags via mount option 2012-01-12 11:00:40 -08:00
coda.txt
cramfs.txt
debugfs.txt debugfs: more tightly restrict default mount mode 2012-08-27 13:42:02 -07:00
devpts.txt
directory-locking vfs: take i_mutex on renamed file 2013-11-09 00:16:40 -05:00
dlmfs.txt Documentation/: it's -> its where appropriate 2010-04-23 02:09:52 +02:00
dnotify_test.c Documentation/fs/: split txt and source files 2010-03-12 15:52:35 -08:00
dnotify.txt Documentation/fs/: split txt and source files 2010-03-12 15:52:35 -08:00
ecryptfs.txt
efivarfs.txt efivarfs: Add documentation for the EFI variable filesystem 2012-10-30 10:39:18 +00:00
exofs.txt exofs: Add option to mount by osdname 2011-03-15 15:02:51 +02:00
ext2.txt
ext3.txt ext3: allow specifying external journal by pathname mount option 2013-07-31 22:11:15 +02:00
ext4.txt 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.txt f2fs: update documents and a MAINTAINERS entry 2014-01-09 21:00:06 +09:00
fiemap.txt Documentation/: it's -> its where appropriate 2010-04-23 02:09:52 +02:00
files.txt Wrap accesses to the fd_sets in struct fdtable 2012-02-19 10:30:52 -08:00
fuse.txt Documentation/: it's -> its where appropriate 2010-04-23 02:09:52 +02:00
gfs2-glocks.txt GFS2: Update glock doc to add new stats info 2012-05-10 12:41:40 +01:00
gfs2-uevents.txt Documentation: Fix multiple typo in Documentation 2012-03-07 16:08:24 +01:00
gfs2.txt GFS2: Update main gfs2 doc 2012-05-10 11:45:31 +01:00
hfs.txt Documentation: HFS is orphaned 2011-11-04 12:01:48 -07:00
hfsplus.txt Documentation: update URL to hfsplus Technote 1150 2014-02-20 14:48:51 +01:00
hpfs.txt Documentation/: it's -> its where appropriate 2010-04-23 02:09:52 +02:00
inotify.txt Documentation: fix inotify source file paths 2011-11-04 12:01:47 -07:00
isofs.txt Documentation: update broken web addresses. 2010-08-04 15:21:40 +02:00
jfs.txt doc: fix misspellings with 'codespell' tool 2013-05-28 12:02:12 +02:00
Locking doc: Fix typo (acces_process_vm -> access_process_vm) 2013-12-19 15:12:21 +01:00
locks.txt doc: fix broken references 2011-09-27 18:08:04 +02:00
logfs.txt fix "seperate" typos in comments 2010-05-10 11:56:30 +02:00
Makefile Documentation/fs/: split txt and source files 2010-03-12 15:52:35 -08:00
mandatory-locking.txt
ncpfs.txt
nilfs2.txt nilfs2: implementation of NILFS_IOCTL_SET_SUINFO ioctl 2014-04-03 16:21:25 -07:00
ntfs.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
ocfs2.txt ocfs2: clean up mount option about atime in ocfs2.txt 2011-05-23 23:37:12 -07:00
omfs.txt
path-lookup.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
porting mm + fs: store shadow entries in page cache 2014-04-03 16:21:01 -07:00
proc.txt mm, oom: base root bonus on current usage 2014-01-30 16:56:56 -08:00
qnx6.txt doc: filesystems : Fix typo in Documentations/filesystems 2013-08-20 13:45:56 +02:00
quota.txt
ramfs-rootfs-initramfs.txt initmpfs: use initramfs if rootfstype= or root= specified 2013-09-11 15:59:38 -07:00
relay.txt doc: Fix typo in doucmentations 2013-07-25 12:34:15 +02:00
romfs.txt Documentation/filesystems/romfs.txt: fixing link to genromfs 2011-02-17 22:04:46 +01:00
seq_file.txt seq_file: use proc_create() in documentation 2009-12-16 07:20:07 -08:00
sharedsubtree.txt Documentation: Fix trivial typo in filesystems/sharedsubtree.txt 2010-10-25 21:18:21 -04:00
spufs.txt
squashfs.txt Squashfs: Update documentation to include xattrs 2011-12-30 01:20:24 +00:00
sysfs-pci.txt PCI: Allow read/write access to sysfs I/O port resources 2010-07-30 09:32:08 -07:00
sysfs-tagging.txt doc: Fix typo in doucmentations 2013-07-25 12:34:15 +02:00
sysfs.txt Documentation/filesystems/sysfs.txt: fix device_attribute declaration 2014-01-23 16:37:00 -08:00
sysv-fs.txt
tmpfs.txt mempolicy: document cpuset interaction with tmpfs mpol mount option 2010-05-25 08:06:57 -07:00
ubifs.txt UBIFS: switch self-check knobs to debugfs 2011-07-04 10:54:28 +03:00
udf.txt
ufs.txt
vfat.txt Documentation/filesystems/vfat.txt: fix directory entry example 2013-11-13 12:09:32 +09:00
vfs.txt Documentation/filesystems/vfs.txt: update file_operations documentation 2014-01-30 16:56:56 -08:00
xfs-delayed-logging-design.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
xfs-self-describing-metadata.txt xfs: add metadata CRC documentation 2013-04-27 13:27:43 -05:00
xfs.txt doc: filesystems : Fix typo in Documentations/filesystems 2013-08-20 13:45:56 +02:00
xip.txt