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Linus Torvalds 55d8538498 Fix performance regression on lmbench select benchmark 
Christian Borntraeger reported that reinstating cond_resched() with
CONFIG_PREEMPT caused a performance regression on lmbench:

	For example select file 500:
	23 microseconds
	32 microseconds

and that's really because we totally unnecessarily do the cond_resched()
in the innermost loop of select(), which is just silly.

This moves it out from the innermost loop (which only ever loops ove the
bits in a single "unsigned long" anyway), which makes the performance
regression go away.

Reported-and-tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-22 12:23:15 -07:00
..
9p
9p: fix error path during early mount
2008-05-14 19:23:27 -05:00
adfs
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
affs
[PATCH] fix reservation discarding in affs
2008-05-06 13:45:33 -04:00
afs
Fix various old email addresses for dwmw2
2008-06-06 11:29:10 -07:00
autofs
mount options: fix autofs
2008-02-08 09:22:40 -08:00
autofs4
autofs: path_{get,put}() cleanups
2008-05-01 08:04:01 -07:00
befs
byteorder: don't directly include linux/byteorder/generic.h
2008-05-16 12:01:45 -07:00
bfs
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
cifs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
2008-06-11 09:45:51 -07:00
coda
codafs: fix build warning
2008-04-29 08:06:04 -07:00
configfs
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
cramfs
fs: Remove unnecessary inclusions of asm/semaphore.h
2008-04-18 22:16:44 -04:00
debugfs
DEBUGFS: Correct location of debugfs API documentation.
2008-04-30 16:52:47 -07:00
devpts
devpts: factor out PTY index allocation
2008-04-30 08:29:48 -07:00
dlm
dlm: fix plock dev_write return value
2008-05-19 15:37:27 -05:00
ecryptfs
eCryptfs: remove unnecessary page decrypt call
2008-06-06 11:29:09 -07:00
efs
efs: update error msg to not refer to deleted read_inode()
2008-04-02 15:28:19 -07:00
exportfs
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
ext2
ext2: retry block allocation if new blocks are allocated from system zone
2008-04-28 08:58:43 -07:00
ext3
ext3: fix online resize bug
2008-06-06 11:29:13 -07:00
ext4
Ext4: Fix online resize block group descriptor corruption
2008-06-20 11:48:48 -04:00
fat
fat: relax the permission check of fat_setattr()
2008-06-12 18:05:39 -07:00
freevxfs
fs/freevxfs/: proper externs
2008-04-29 08:06:00 -07:00
fuse
fuse: fix thinko in max I/O size calucation
2008-06-17 18:08:10 -07:00
gfs2
[GFS2] Prefer strlcpy() over snprintf()
2008-05-12 08:57:11 +01:00
hfs
hfs: fix warning with 64k PAGE_SIZE
2008-04-30 08:29:52 -07:00
hfsplus
Fix hfsplus oops on image without extents
2008-05-13 08:02:24 -07:00
hostfs
uml: fix hostfs tv_usec calculations
2008-02-05 09:44:30 -08:00
hpfs
mount options: fix hpfs
2008-02-08 09:22:40 -08:00
hppfs
fix hppfs Makefile breakage
2008-05-21 16:55:58 -07:00
hugetlbfs
mm: bdi: add separate writeback accounting capability
2008-04-30 08:29:50 -07:00
isofs
isofs: fix access to unallocated memory when reading corrupted filesystem
2008-04-30 08:29:33 -07:00
jbd
jbd: need to hold j_state_lock to updates to transaction t_state to T_COMMIT
2008-05-14 19:11:14 -07:00
jbd2
jbd2: Fix barrier fallback code to re-lock the buffer head
2008-06-03 22:31:11 -04:00
jffs2
Merge git://git.infradead.org/mtd-2.6
2008-05-01 11:15:28 -07:00
jfs
proc: remove proc_root_fs
2008-04-29 08:06:18 -07:00
lockd
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
minix
iget: stop the MINIX filesystem from using iget() and read_inode()
2008-02-07 08:42:28 -08:00
msdos
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
ncpfs
ncpfs: use get/put_unaligned_* helpers
2008-04-29 08:06:28 -07:00
nfs
nfs: make nfs4_drop_state_owner() static
2008-05-16 09:43:31 -07:00
nfs_common
…
nfsd
nfsd: reorder printk in do_probe_callback to avoid use-after-free
2008-05-18 19:13:07 -04:00
nls
sparse pointer use of zero as null
2007-10-18 14:37:31 -07:00
ntfs
ntfs: le*_add_cpu conversion
2008-05-24 09:56:08 -07:00
ocfs2
ocfs2: Remove ->hangup() from stack glue operations.
2008-06-16 10:46:52 -07:00
openpromfs
iget: stop OPENPROMFS from using iget() and read_inode()
2008-02-07 08:42:29 -08:00
partitions
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
proc
pagemap: fix large pages in pagemap
2008-06-12 18:05:41 -07:00
qnx4
iget: stop QNX4 from using iget() and read_inode()
2008-02-07 08:42:28 -08:00
ramfs
mm: bdi: add separate writeback accounting capability
2008-04-30 08:29:50 -07:00
reiserfs
reiserfs: use open_bdev_excl
2008-04-30 08:29:51 -07:00
romfs
ROMFS: Fix up an error in iget removal
2008-03-19 18:53:36 -07:00
smbfs
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
sysfs
sysfs: remove error messages for -EEXIST case
2008-05-14 22:34:16 -07:00
sysv
sysv: [bl]e*_add_cpu conversion
2008-04-30 08:29:52 -07:00
udf
udf: restore UDFFS_DEBUG to being undefined by default
2008-06-16 14:24:36 +02:00
ufs
ufs: remove unneeded ufs_put_inode prototype
2008-05-13 08:02:23 -07:00
vfat
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
xfs
[XFS] Fix memory corruption with small buffer reads
2008-05-23 18:12:49 +10:00
aio.c
uml: activate_mm: remove the dead PF_BORROWED_MM check
2008-06-06 11:36:22 -07:00
anon_inodes.c
[PATCH] sanitize anon_inode_getfd()
2008-05-01 13:08:50 -04:00
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
iget: introduce a function to register iget failure
2008-02-07 08:42:26 -08:00
binfmt_aout.c
fs/binfmt_aout.c: use printk_ratelimit()
2008-04-29 08:06:04 -07:00
binfmt_elf_fdpic.c
nommu: fix ksize() abuse
2008-06-06 11:29:13 -07:00
binfmt_elf.c
Remove last traces of a.out support from ELF loader.
2008-06-16 10:20:57 -07:00
binfmt_em86.c
binfmt_misc.c: avoid potential kernel stack overflow
2008-04-29 08:06:04 -07:00
binfmt_flat.c
nommu: fix ksize() abuse
2008-06-06 11:29:13 -07:00
binfmt_misc.c
binfmt_misc.c: avoid potential kernel stack overflow
2008-04-29 08:06:04 -07:00
binfmt_script.c
binfmt_misc.c: avoid potential kernel stack overflow
2008-04-29 08:06:04 -07:00
binfmt_som.c
[PATCH] sanitize handling of shared descriptor tables in failing execve()
2008-04-25 09:23:53 -04:00
bio.c
docbook: fix bio missing parameter
2008-05-07 18:35:03 +02:00
block_dev.c
devscgroup: check for device permissions at mount time
2008-06-06 11:29:11 -07:00
buffer.c
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
char_dev.c
fs: remove unused fops from struct char_device_struct
2008-04-29 08:06:01 -07:00
compat_binfmt_elf.c
x86: compat_binfmt_elf
2008-01-30 13:31:46 +01:00
compat_ioctl.c
tty: The big operations rework
2008-04-30 08:29:47 -07:00
compat.c
[PATCH] get rid of leak in compat_execve()
2008-05-16 17:23:05 -04:00
dcache.c
[patch 2/7] vfs: mountinfo: add seq_file_root()
2008-04-23 00:04:38 -04:00
dcookies.c
d_path: Make d_path() use a struct path
2008-02-14 21:17:09 -08:00
direct-io.c
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
dnotify.c
[PATCH] split linux/file.h
2008-05-01 13:08:16 -04:00
dquot.c
quota: don't call sync_fs() from vfs_quota_off() when there's no quota turn off
2008-05-13 08:02:23 -07:00
drop_caches.c
vfs: skip inodes without pages to free in drop_pagecache_sb()
2008-04-29 08:06:05 -07:00
eventfd.c
[PATCH] sanitize anon_inode_getfd()
2008-05-01 13:08:50 -04:00
eventpoll.c
[PATCH] sanitize anon_inode_getfd()
2008-05-01 13:08:50 -04:00
exec.c
Include <asm/a.out.h> in fs/exec.c only for Alpha.
2008-06-16 10:20:57 -07:00
fcntl.c
[PATCH] split linux/file.h
2008-05-01 13:08:16 -04:00
fifo.c
…
file_table.c
[PATCH] split linux/file.h
2008-05-01 13:08:16 -04:00
file.c
[PATCH] avoid multiplication overflows and signedness issues for max_fds
2008-05-16 17:22:52 -04:00
filesystems.c
…
fs-writeback.c
fs/fs-writeback.c: make 2 functions static
2008-04-29 08:06:00 -07:00
generic_acl.c
…
inode.c
VFS: fix unused variable warning
2008-05-06 13:13:37 -07:00
inotify_user.c
Remove duplicated unlikely() in IS_ERR()
2008-04-29 08:06:25 -07:00
inotify.c
inotify: remove debug code
2008-02-06 10:41:07 -08:00
internal.h
[PATCH] move a bunch of declarations to fs/internal.h
2008-04-21 23:11:01 -04:00
ioctl.c
make vfs_ioctl() static
2008-04-29 08:06:00 -07:00
ioprio.c
cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions
2008-01-28 11:38:15 +01:00
Kconfig
[S390] System z large page support.
2008-04-30 13:38:47 +02:00
Kconfig.binfmt
frv: don't offer BINFMT_FLAT
2008-06-06 11:29:08 -07:00
libfs.c
introduce memory_read_from_buffer()
2008-06-06 11:29:11 -07:00
locks.c
Add new 'cond_resched_bkl()' helper function
2008-05-11 16:04:48 -07:00
Makefile
x86: compat_binfmt_elf Kconfig
2008-01-30 13:31:46 +01:00
mbcache.c
vfs: fix possible deadlock in ext2, ext3, ext4 when using xattrs
2008-04-15 19:35:41 -07:00
mpage.c
docbook: fix filesystems.tmpl source files
2008-03-03 10:47:13 -08:00
namei.c
[PATCH] return to old errno choice in mkdir() et.al.
2008-05-16 17:23:18 -04:00
namespace.c
fs: replace remaining __FUNCTION__ occurrences
2008-04-30 08:29:54 -07:00
nfsctl.c
Introduce path_put()
2008-02-14 21:13:33 -08:00
no-block.c
…
open.c
[PATCH] split linux/file.h
2008-05-01 13:08:16 -04:00
pipe.c
sys_pipe(): fix file descriptor leaks
2008-05-08 10:46:56 -07:00
pnode.c
[patch 7/7] vfs: mountinfo: show dominating group id
2008-04-23 00:05:09 -04:00
pnode.h
[patch 7/7] vfs: mountinfo: show dominating group id
2008-04-23 00:05:09 -04:00
posix_acl.c
…
quota_v1.c
quota: do not allow setting of quota limits to too high values
2008-04-28 08:58:32 -07:00
quota_v2.c
quota: le*_add_cpu conversion
2008-04-30 08:29:51 -07:00
quota.c
quota: quota core changes for quotaon on remount
2008-04-28 08:58:33 -07:00
read_write.c
fs: use loff_t type instead of long long
2008-04-22 15:17:11 -07:00
read_write.h
…
readdir.c
Use mutex_lock_killable in vfs_readdir
2007-12-06 17:39:54 -05:00
select.c
Fix performance regression on lmbench select benchmark
2008-06-22 12:23:15 -07:00
seq_file.c
[patch 2/7] vfs: mountinfo: add seq_file_root()
2008-04-23 00:04:38 -04:00
signalfd.c
[PATCH] sanitize anon_inode_getfd()
2008-05-01 13:08:50 -04:00
splice.c
splice: handle try_to_release_page() failure
2008-05-28 14:49:27 +02:00
stack.c
…
stat.c
Introduce path_put()
2008-02-14 21:13:33 -08:00
super.c
make __put_super() static
2008-04-29 08:06:00 -07:00
sync.c
vfs: fix unconditional write_super() call in file_fsync()
2008-04-29 08:06:06 -07:00
timerfd.c
[PATCH] sanitize anon_inode_getfd()
2008-05-01 13:08:50 -04:00
utimes.c
vfs: fix permission checking in sys_utimensat
2008-05-01 08:03:59 -07:00
xattr_acl.c
…
xattr.c
xattr: add missing consts to function arguments
2008-04-29 08:06:06 -07:00