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linux/fs
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OGAWA Hirofumi 9f966be899 fat: optimize fat_count_free_clusters() 
On large partition, scanning the free clusters is very slow if users
doesn't use "usefree" option.

For optimizing it, this patch uses sb_breadahead() to read of FAT
sectors. On some user's 15GB partition, this patch improved it very
much (1min => 600ms).

The following is the result of 2GB partition on my machine.

without patch:
	root@devron (/)# time df -h > /dev/null

	real    0m1.202s
	user    0m0.000s
	sys     0m0.440s

with patch:
	root@devron (/)# time df -h > /dev/null

	real    0m0.378s
	user    0m0.012s
	sys     0m0.168s

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-08 16:10:35 -08:00
..
9p
9p: use copy of the options value instead of original
2007-11-06 08:02:53 -06:00
adfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
affs
fs: mark nibblemap const
2007-10-17 08:42:47 -07:00
afs
fs/afs/vlocation.c: fix off-by-one
2007-11-05 15:12:32 -08:00
autofs
Use task_pid_nr() instead of pid_nr(task_pid())
2007-10-19 11:53:43 -07:00
autofs4
pid namespaces: round up the API
2007-10-19 11:53:37 -07:00
befs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
bfs
regression: bfs endianness bug
2007-12-05 09:25:20 -08:00
cifs
regression: cifs endianness bug
2007-12-05 09:25:19 -08:00
coda
pid namespaces: round up the API
2007-10-19 11:53:37 -07:00
configfs
r/o bind mounts: filesystem helpers for custom 'struct file's
2007-10-17 08:43:04 -07:00
cramfs
fs/cramfs/inode.c: replace hardcoded value with preprocessor constant
2007-10-18 14:37:29 -07:00
debugfs
[PATCH] pass dentry to audit_inode()/audit_inode_child()
2007-10-21 02:37:18 -04:00
devpts
devpts: add fsnotify create event
2007-05-08 11:14:59 -07:00
dlm
[DLM] lowcomms: Do not muck with sysctl_rmem_max.
2007-11-07 04:11:42 -08:00
ecryptfs
ecryptfs: redo dget,mntget on dentry_open failure
2007-12-23 12:54:37 -08:00
efs
exportfs: make struct export_operations const
2007-10-22 08:13:21 -07:00
exportfs
exportfs: update documentation
2007-10-22 08:13:21 -07:00
ext2
fix up ext2_fs.h for userspace after reservations backport
2007-11-29 09:24:53 -08:00
ext3
ext3, ext4: avoid divide by zero
2007-12-17 19:28:16 -08:00
ext4
ext3, ext4: avoid divide by zero
2007-12-17 19:28:16 -08:00
fat
fat: optimize fat_count_free_clusters()
2008-01-08 16:10:35 -08:00
freevxfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
fuse
fuse: fix attribute caching after rename
2007-11-29 09:24:54 -08:00
gfs2
exportfs: make struct export_operations const
2007-10-22 08:13:21 -07:00
hfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
hfsplus
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
hostfs
uml: fix hostfs style
2007-10-16 09:43:07 -07:00
hpfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
hppfs
[PATCH] Mark struct super_operations const
2007-02-12 09:48:47 -08:00
hugetlbfs
hugetlb: allow bulk updating in hugetlb_*_quota()
2007-11-14 18:45:40 -08:00
isofs
exportfs: make struct export_operations const
2007-10-22 08:13:21 -07:00
jbd
jbd: Fix assertion failure in fs/jbd/checkpoint.c
2007-12-05 09:21:20 -08:00
jbd2
JBD2: debug code cleanup.
2007-10-17 18:49:59 -04:00
jffs2
Freezer: Fix JFFS2 garbage collector freezing issue (rev. 2)
2007-12-04 01:35:41 -05:00
jfs
Forbid user to change file flags on quota files
2007-11-14 18:45:38 -08:00
lockd
NFS/SUNRPC: use transport protocol naming
2007-10-09 17:17:53 -04:00
minix
limit minixfs printks on corrupted dir i_size
2007-10-17 08:42:53 -07:00
msdos
[PATCH] mark struct inode_operations const 2
2007-02-12 09:48:46 -08:00
ncpfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
nfs
NFSv4: Fix open_to_lock_owner sequenceid allocation...
2008-01-03 09:37:17 -05:00
nfs_common
…
nfsd
nfsd4: recheck for secure ports in fh_verify
2007-11-12 14:28:08 -08:00
nls
sparse pointer use of zero as null
2007-10-18 14:37:31 -07:00
ntfs
NTFS: Fix read regression.
2007-11-03 12:27:21 -07:00
ocfs2
ocfs2: Re-journal buffers after transaction extend
2007-12-17 10:51:23 -08:00
openpromfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
partitions
fs/partitions/sun.c endianness annotations
2007-10-14 12:41:51 -07:00
proc
restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid
2008-01-02 13:13:27 -08:00
qnx4
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
ramfs
Remove valueless definition of hard-selected RAMFS option
2007-10-17 08:42:56 -07:00
reiserfs
proc: fix proc_dir_entry refcounting
2007-12-05 09:21:20 -08:00
romfs
fs/romfs/inode.c: trivial improvements
2007-10-17 08:42:47 -07:00
smbfs
smbfs: fix debug builds
2007-11-14 18:45:43 -08:00
sysfs
sysfs: fix off-by-one error in fill_read_buffer()
2007-11-28 13:53:53 -08:00
sysv
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
udf
fs/udf/balloc.c: mark a variable as uninitialized_var()
2007-10-17 08:43:00 -07:00
ufs
ufs: fix nexstep dir block size
2007-12-05 09:21:18 -08:00
vfat
[PATCH] mark struct inode_operations const 3
2007-02-12 09:48:46 -08:00
xfs
[XFS] Initialise current offset in xfs_file_readdir correctly
2007-12-21 11:40:05 +11:00
aio.c
aio: only account I/O wait time in read_events if there are active requests
2007-12-05 09:21:18 -08:00
anon_inodes.c
anon-inodes use open coded atomic_inc for the shared inode
2007-10-17 08:43:00 -07:00
attr.c
VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations
2007-10-18 14:37:22 -07:00
bad_inode.c
sendfile: remove bad_sendfile() from bad_file_ops
2007-07-10 08:04:15 +02:00
binfmt_aout.c
mm: fix exit_mmap BUG() on a.out binary exit
2007-12-20 07:49:53 -08:00
binfmt_elf_fdpic.c
pid namespaces: changes to show virtual ids to user
2007-10-19 11:53:40 -07:00
binfmt_elf.c
core dump: real_parent ppid
2008-01-07 14:55:37 -08:00
binfmt_em86.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_flat.c
binfmt_flat: warning fixes
2007-10-17 08:42:54 -07:00
binfmt_misc.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_script.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_som.c
core_pattern: ignore RLIMIT_CORE if core_pattern is a pipe
2007-10-17 08:42:50 -07:00
bio.c
bio: make freeing of ->bi_io_vec conditional in bio_free()
2007-10-16 11:03:52 +02:00
block_dev.c
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
buffer.c
nobh: nobh_write_end fix
2007-10-21 08:54:05 -07:00
char_dev.c
mm: bdi init hooks
2007-10-17 08:42:45 -07:00
compat_ioctl.c
fix: using joysticks in 32 bit applications on 64 bit systems
2008-01-06 10:26:06 -08:00
compat.c
mm: variable length argument support
2007-07-19 10:04:45 -07:00
dcache.c
dcache: don't expose uninitialized memory in /proc/<pid>/fd/<fd>
2007-10-22 08:13:18 -07:00
dcookies.c
Remove fs.h from mm.h
2007-07-29 17:09:29 -07:00
direct-io.c
remove ZERO_PAGE
2007-10-16 09:42:53 -07:00
dnotify.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
dquot.c
Don't send quota messages repeatedly when hardlimit reached
2007-12-23 12:54:36 -08:00
drop_caches.c
invalidate_mapping_pages(): add cond_resched
2007-07-16 09:05:36 -07:00
eventfd.c
eventfd use waitqueue lock ...
2007-05-18 13:09:34 -07:00
eventpoll.c
fs/eventpoll.c: use list_for_each_entry() instead of list_for_each()
2007-10-19 11:53:38 -07:00
exec.c
vfs: coredumping fix
2007-11-28 10:58:01 -08:00
fcntl.c
pid namespaces: changes to show virtual ids to user
2007-10-19 11:53:40 -07:00
fifo.c
Detach sched.h from mm.h
2007-05-21 09:18:19 -07:00
file_table.c
fs/file_table.c: use list_for_each_entry() instead of list_for_each()
2007-10-19 11:53:38 -07:00
file.c
[PATCH] fdtable: Provide free_fdtable() wrapper
2006-12-22 08:55:50 -08:00
filesystems.c
add filesystem subtype support
2007-05-08 11:15:01 -07:00
fs-writeback.c
Use helpers to obtain task pid in printks
2007-10-19 11:53:43 -07:00
generic_acl.c
Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check
2007-07-17 12:00:03 -07:00
inode.c
introduce I_SYNC
2007-10-17 08:43:02 -07:00
inotify_user.c
change inotifyfs magic as the same magic is used for futexfs
2007-10-17 08:43:00 -07:00
inotify.c
[PATCH] new helper - inotify_evict_watch()
2007-10-21 02:37:38 -04:00
internal.h
cleanup compat ioctl handling
2007-05-08 11:15:09 -07:00
ioctl.c
drop obsolete sys_ioctl export
2007-07-16 09:05:48 -07:00
ioprio.c
ioprio: allow sys_ioprio_set() value of 0 to reset ioprio setting
2007-11-07 13:54:07 +01:00
Kconfig
fs/Kconfig: grammar fix
2007-12-17 19:28:16 -08:00
Kconfig.binfmt
fs: Kill sh dependency for binfmt_flat.
2007-05-21 14:34:00 +09:00
libfs.c
exportfs: add new methods
2007-10-22 08:13:19 -07:00
locks.c
locks: fix possible infinite loop in posix deadlock detection
2007-10-30 09:04:18 -07:00
Makefile
Remove valueless definition of hard-selected RAMFS option
2007-10-17 08:42:56 -07:00
mbcache.c
fs: Fix to correct the mbcache entries counter
2007-10-25 15:18:29 -07:00
mpage.c
mm: buffered write cleanup
2007-10-16 09:42:54 -07:00
namei.c
[PATCH] pass dentry to audit_inode()/audit_inode_child()
2007-10-21 02:37:18 -04:00
namespace.c
[PATCH] new helpers - collect_mounts() and release_collected_mounts()
2007-10-21 02:37:25 -04:00
nfsctl.c
nfsctl: use vfs_path_lookup
2007-07-19 10:04:45 -07:00
no-block.c
…
open.c
mark sys_open/sys_read exports unused
2007-11-14 18:45:42 -08:00
pipe.c
sched: affine sync wakeups
2007-10-15 17:00:19 +02:00
pnode.c
Introduce a handy list_first_entry macro
2007-05-08 11:15:11 -07:00
pnode.h
[PATCH] new helpers - collect_mounts() and release_collected_mounts()
2007-10-21 02:37:25 -04:00
posix_acl.c
…
quota_v1.c
…
quota_v2.c
…
quota.c
[IA64] Fix build failure in fs/quota.c
2007-07-27 15:40:13 -07:00
read_write.c
mark sys_open/sys_read exports unused
2007-11-14 18:45:42 -08:00
read_write.h
…
readdir.c
ROUND_UP macro cleanup in fs/(select|compat|readdir).c
2007-05-08 11:15:09 -07:00
select.c
fs/select, remove unused macros
2007-10-19 11:53:41 -07:00
seq_file.c
[FS] seq_file: Introduce the seq_open_private()
2007-10-10 16:55:33 -07:00
signalfd.c
rename signalfd_siginfo fields
2007-10-17 08:43:01 -07:00
splice.c
Implement file posix capabilities
2007-10-17 08:43:07 -07:00
stack.c
[PATCH] fs/stack.c: Copy i_nlink after all other attributes are copied
2007-02-19 14:21:50 -08:00
stat.c
header cleaning: don't include smp_lock.h when not used
2007-05-08 11:15:07 -07:00
super.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
sync.c
Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM
2007-06-28 11:38:30 -07:00
timerfd.c
make timerfd return a u64 and fix the __put_user
2007-07-26 11:35:17 -07:00
utimes.c
VFS: check nanoseconds in utimensat
2007-10-17 08:42:52 -07:00
xattr_acl.c
[PATCH] remove many unneeded #includes of sched.h
2007-02-14 08:09:54 -08:00
xattr.c
[PATCH] pass dentry to audit_inode()/audit_inode_child()
2007-10-21 02:37:18 -04:00