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Ryusuke Konishi 53a2c3bdf4 nilfs2: improve execution time of NILFS_IOCTL_GET_CPINFO ioctl 
The older a filesystem gets, the slower lscp command becomes.  This is
because nilfs_cpfile_do_get_cpinfo() function meets more hole blocks
as the start offset of valid checkpoint numbers gets bigger.

This reduces the overhead by skipping hole blocks efficiently with
nilfs_mdt_find_block() helper.

A measurement result of this patch is as follows:

Before:
$ time lscp
                 CNO        DATE     TIME  MODE  FLG      BLKCNT       ICNT
             5769303  2015-02-22 19:31:33   cp    -          108          1
             5769304  2015-02-22 19:38:54   cp    -          108          1

real    0m0.182s
user    0m0.003s
sys     0m0.180s

After:
$ time lscp
                 CNO        DATE     TIME  MODE  FLG      BLKCNT       ICNT
             5769303  2015-02-22 19:31:33   cp    -          108          1
             5769304  2015-02-22 19:38:54   cp    -          108          1

real    0m0.003s
user    0m0.001s
sys     0m0.002s

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>
2015-04-17 09:04:04 -04:00
..
9p
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
adfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
affs
Merge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-14 15:31:03 -07:00
afs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
autofs4
autofs: switch to __vfs_write()
2015-04-11 22:29:37 -04:00
befs
befs: replace typedef befs_inode_info by structure
2015-04-17 09:04:03 -04:00
bfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
btrfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
cachefiles
Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
2015-02-22 11:38:41 -05:00
ceph
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
cifs
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-15 13:22:56 -07:00
coda
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
configfs
configfs: Fix potential NULL d_inode dereference
2015-02-20 04:56:43 -05:00
cramfs
fs/cramfs/inode.c: use linux/uaccess.h
2014-08-08 15:57:25 -07:00
debugfs
debugfs: allow bad parent pointers to be passed in
2015-04-03 16:30:12 +02:00
devpts
…
dlm
netlink: make nlmsg_end() and genlmsg_end() void
2015-01-18 01:03:45 -05:00
ecryptfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
efivarfs
* Move efivarfs from the misc filesystem section to pseudo filesystem,
2015-01-29 19:16:40 +01:00
efs
fs/efs/namei.c: return is not a function
2014-08-08 15:57:18 -07:00
exofs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
exportfs
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
ext2
Merge branch 'akpm' (patches from Andrew)
2015-04-15 16:39:15 -07:00
ext3
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
ext4
Merge branch 'akpm' (patches from Andrew)
2015-04-15 16:39:15 -07:00
f2fs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
fat
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
freevxfs
…
fscache
fs/fscache/object-list.c: use __seq_open_private()
2014-10-13 17:52:21 +01:00
fuse
fuse: use iov_iter_get_pages() for non-splice path
2015-04-11 22:29:41 -04:00
gfs2
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-15 13:22:56 -07:00
hfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
hfsplus
Merge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-14 15:31:03 -07:00
hostfs
Merge tag 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
2015-04-15 13:49:27 -07:00
hpfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
hppfs
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
hugetlbfs
Merge branch 'akpm' (patches from Andrew)
2015-04-15 16:39:15 -07:00
isofs
isofs: Fix bug in the way to check if the year is a leap year
2015-01-07 09:51:49 +01:00
jbd
jbd: Deletion of an unnecessary check before the function call "iput"
2014-11-18 10:15:29 +01:00
jbd2
jbd2: complain about descriptor block checksum errors
2015-01-19 15:59:58 -05:00
jffs2
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-15 13:22:56 -07:00
jfs
Merge branch 'akpm' (patches from Andrew)
2015-04-15 16:39:15 -07:00
kernfs
kernfs: handle poll correctly on 'direct_read' files.
2015-03-16 21:51:20 +01:00
lockd
Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
2015-02-12 10:39:41 -08:00
logfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
minix
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
ncpfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
nfs
Merge branch 'akpm' (patches from Andrew)
2015-04-15 16:39:15 -07:00
nfs_common
lockd: move lockd's grace period handling into its own module
2014-09-17 16:33:11 -04:00
nfsd
Merge branch 'akpm' (patches from Andrew)
2015-04-15 16:39:15 -07:00
nilfs2
nilfs2: improve execution time of NILFS_IOCTL_GET_CPINFO ioctl
2015-04-17 09:04:04 -04:00
nls
…
notify
fanotify: fix event filtering with FAN_ONDIR set
2015-03-12 18:46:08 -07:00
ntfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
ocfs2
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-15 13:22:56 -07:00
omfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
openpromfs
…
overlayfs
ovl: upper fs should not be R/O
2015-03-18 10:29:48 +01:00
proc
proc: remove use of seq_printf return value
2015-04-15 16:35:25 -07:00
pstore
pstore: Fix the ramoops module parameters update
2015-03-16 11:14:10 -07:00
qnx4
…
qnx6
fs/qnx6: update debugging to current functions
2014-08-08 15:57:26 -07:00
quota
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2015-02-10 15:52:38 -08:00
ramfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
reiserfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
romfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
squashfs
Squashfs: Add LZ4 compression configuration option
2014-11-27 18:48:44 +00:00
sysfs
sysfs: Only accept read/write permissions for file attributes
2015-03-25 13:27:57 +01:00
sysv
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
tracefs
tracing: Have mkdir and rmdir be part of tracefs
2015-02-03 12:48:43 -05:00
ubifs
This pull request includes the following UBI/UBIFS changes:
2015-04-15 13:43:40 -07:00
udf
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
ufs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
xfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
aio.c
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-15 13:22:56 -07:00
anon_inodes.c
…
attr.c
…
bad_inode.c
don't bother with most of the bad_file_ops methods
2015-02-20 04:03:58 -05:00
binfmt_aout.c
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
binfmt_elf_fdpic.c
handle suicide on late failure exits in execve() in search_binary_handler()
2014-10-09 02:39:00 -04:00
binfmt_elf.c
mm: fold arch_randomize_brk into ARCH_HAS_ELF_RANDOMIZE
2015-04-14 16:49:05 -07:00
binfmt_em86.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
binfmt_flat.c
…
binfmt_misc.c
fs/binfmt_misc.c: simplify entry_status()
2015-04-17 09:03:59 -04:00
binfmt_script.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
block_dev.c
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
buffer.c
page_writeback: clean up mess around cancel_dirty_page()
2015-04-14 16:49:01 -07:00
char_dev.c
fs: introduce f_op->mmap_capabilities for nommu mmap support
2015-01-20 14:02:58 -07:00
compat_binfmt_elf.c
…
compat_ioctl.c
Bluetooth: bnep: Add support for get bnep features via ioctl
2015-04-03 23:21:34 +02:00
compat.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
coredump.c
coredump: accept any write method
2015-04-11 22:29:39 -04:00
dax.c
dax: use pfn_mkwrite to update c/mtime + freeze protection
2015-04-15 16:35:20 -07:00
dcache.c
dcache: return -ESTALE not -EBUSY on distributed fs race
2015-04-11 22:24:33 -04:00
dcookies.c
…
direct-io.c
fs: move struct kiocb to fs.h
2015-03-25 20:28:11 -04:00
drop_caches.c
vmscan: per memory cgroup slab shrinkers
2015-02-12 18:54:09 -08:00
eventfd.c
eventfd: don't take the spinlock in eventfd_poll
2015-02-17 14:34:52 -08:00
eventpoll.c
epoll: optimize setting task running after blocking
2015-02-13 21:21:40 -08:00
exec.c
fs: create proper filename objects using getname_kernel()
2015-01-23 00:22:20 -05:00
fcntl.c
vfs: renumber FMODE_NONOTIFY and add to uniqueness check
2015-01-08 15:10:52 -08:00
fhandle.c
…
file_table.c
->aio_read and ->aio_write removed
2015-04-11 22:29:43 -04:00
file.c
fs/file.c: replace get_unused_fd() with get_unused_fd_flags(0)
2014-12-10 17:41:10 -08:00
filesystems.c
…
fs_pin.c
switch the IO-triggering parts of umount to fs_pin
2015-01-25 23:17:29 -05:00
fs_struct.c
…
fs-writeback.c
fs: add dirtytime_expire_seconds sysctl
2015-03-17 12:23:32 -04:00
inode.c
Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-02-17 16:12:34 -08:00
internal.h
trylock_super(): replacement for grab_super_passive()
2015-02-22 11:38:42 -05:00
ioctl.c
fsioctl.c: make generic_block_fiemap() signal-tolerant
2015-02-10 14:30:30 -08:00
Kconfig
dax: does not work correctly with virtual aliasing caches
2015-02-16 17:56:04 -08:00
Kconfig.binfmt
mm: split ET_DYN ASLR from mmap ASLR
2015-04-14 16:49:05 -07:00
libfs.c
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
locks.c
locks: use cmpxchg to assign i_flctx pointer
2015-04-03 09:04:04 -04:00
Makefile
This adds the new tracefs file system. This has been in linux-next for
2015-04-14 10:22:29 -07:00
mbcache.c
…
mount.h
switch the IO-triggering parts of umount to fs_pin
2015-01-25 23:17:29 -05:00
mpage.c
vfs: guard end of device for mpage interface
2014-10-09 22:25:53 -04:00
namei.c
remove incorrect comment in lookup_one_len()
2015-04-11 22:24:30 -04:00
namespace.c
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
no-block.c
…
nsfs.c
take the targets of /proc/*/ns/* symlinks to separate fs
2014-12-10 21:30:20 -05:00
open.c
->aio_read and ->aio_write removed
2015-04-11 22:29:43 -04:00
pipe.c
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
pnode.c
mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers.
2014-12-02 10:46:50 -06:00
pnode.h
…
posix_acl.c
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
proc_namespace.c
vfs: add support for a lazytime mount option
2015-02-05 02:45:00 -05:00
read_write.c
->aio_read and ->aio_write removed
2015-04-11 22:29:43 -04:00
readdir.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
select.c
all arches, signal: move restart_block to struct task_struct
2015-02-12 18:54:12 -08:00
seq_file.c
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
signalfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
splice.c
dax: unify ext2/4_{dax,}_file_operations
2015-04-15 16:35:20 -07:00
stack.c
fs: fix comment for 'CONFIG_LBADF'
2014-08-26 09:35:56 +02:00
stat.c
switch security_inode_getattr() to struct path *
2015-04-11 22:24:32 -04:00
statfs.c
…
super.c
cleancache: remove limit on the number of cleancache enabled filesystems
2015-04-14 16:49:03 -07:00
sync.c
vfs: add support for a lazytime mount option
2015-02-05 02:45:00 -05:00
timerfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
utimes.c
…
xattr.c
new helper: audit_file()
2014-11-19 13:01:26 -05:00