Richard Kennedy 019b4d123a fs: buffer_head: remove kmem_cache constructor to reduce memory usage under slub ...

When using slub, having a kmem_cache constructor forces slub to add a free
pointer to the size of the cached object, which can have a significant
impact to the number of small objects that can fit into a slab.

As buffer_head is relatively small and we can have large numbers of them,
removing the constructor is a definite win.

On x86_64 removing the constructor gives me 39 objects/slab, 3 more than
without the patch.  And on x86_32 73 objects/slab, which is 9 more.

As alloc_buffer_head() already initializes each new object there is very
little difference in actual code run.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Nick Piggin <npiggin@suse.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2010-03-12 15:52:27 -08:00

..

9p

fs/9p: Add hardlink support to .u extension

2010-03-05 15:04:42 -06:00

adfs

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

affs

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

afs

make sure data is on disk before calling ->write_inode

2010-03-05 13:25:10 -05:00

autofs

trivial: remove unnecessary semicolons

2009-09-21 15:14:58 +02:00

autofs4

Use kill_litter_super() in autofs4 ->kill_sb()

2010-03-03 14:07:54 -05:00

befs

befs: fix leak

2010-02-07 03:06:21 -05:00

bfs

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

btrfs

Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

2010-03-08 14:07:53 -08:00

cachefiles

CacheFiles: Fix a race in cachefiles_delete_object() vs rename

2010-02-20 10:06:35 -05:00

cifs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2010-03-04 08:15:33 -08:00

coda

sysctl: Drop & in front of every proc_handler.

2009-11-18 08:37:40 -08:00

configfs

Fix configfs leak

2010-01-14 09:05:42 -05:00

cramfs

fs/cramfs: return f_fsid for statfs(2)

2009-04-02 19:05:08 -07:00

debugfs

Lose the new_name argument of fsnotify_move()

2010-02-08 14:38:36 -05:00

devpts

devpts_get_tty() should validate inode

2009-12-11 15:18:05 -08:00

dlm

Driver core: Constify struct sysfs_ops in struct kobj_type

2010-03-07 17:04:49 -08:00

ecryptfs

ecryptfs: use after free

2010-01-19 22:36:06 -06:00

efs

get rid of BKL in fs/efs

2009-06-17 00:36:36 -04:00

exofs

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

exportfs

nfs: new subdir Documentation/filesystems/nfs

2009-10-27 19:34:04 -04:00

ext2

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2010-03-05 13:20:53 -08:00

ext3

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2010-03-05 13:20:53 -08:00

ext4

Driver core: Constify struct sysfs_ops in struct kobj_type

2010-03-07 17:04:49 -08:00

fat

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

freevxfs

headers: smp_lock.h redux

2009-07-12 12:22:34 -07:00

fscache

FS-Cache: Remove the EXPERIMENTAL flag

2010-03-08 07:32:34 -08:00

fuse

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

2010-03-03 08:08:21 -08:00

gfs2

Driver core: Constify struct sysfs_ops in struct kobj_type

2010-03-07 17:04:49 -08:00

hfs

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

hfsplus

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

hostfs

hostfs: set maximum filesize in superblock for proper LFS support

2009-06-30 18:56:03 -07:00

hpfs

Don't mess with generic_permission() under ->d_lock in hpfs

2010-03-03 14:07:58 -05:00

hppfs

hppfs can use existing proc_mnt, no need for do_kern_mount() in there

2010-03-03 14:08:00 -05:00

hugetlbfs

Untangling ima mess, part 1: alloc_file()

2009-12-16 12:16:47 -05:00

isofs

Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linux

2009-12-16 10:43:34 -08:00

jbd

jbd: Delay discarding buffers in journal_unmap_buffer

2010-03-05 00:20:26 +01:00

jbd2

jbd2: clean up an assertion in jbd2_journal_commit_transaction()

2010-02-24 12:11:20 -05:00

jffs2

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2009-12-16 12:04:02 -08:00

jfs

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2010-03-05 13:20:53 -08:00

lockd

lockd: don't clear sm_monitored on nsm_reboot_lookup

2010-02-08 16:20:35 -05:00

logfs

Merge git://git.kernel.org/pub/scm/linux/kernel/git/joern/logfs

2010-03-06 13:18:03 -08:00

minix

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

ncpfs

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

nfs

Merge branch 'for-2.6.34' of git://linux-nfs.org/~bfields/linux

2010-03-06 11:31:38 -08:00

nfs_common

…

nfsd

Merge branch 'for-2.6.34' of git://linux-nfs.org/~bfields/linux

2010-03-06 11:31:38 -08:00

nilfs2

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2010-03-04 08:15:33 -08:00

nls

Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6

2009-09-30 09:31:14 -07:00

notify

switch inotify_user to anon_inode

2010-02-19 03:35:12 -05:00

ntfs

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

ocfs2

fs/ocfs2/cluster/tcp.c: remove use of NIPQUAD, use %pI4

2010-03-12 15:52:27 -08:00

omfs

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

openpromfs

…

partitions

block: Stop using byte offsets

2010-01-11 14:30:09 +01:00

proc

proc: warn on non-existing proc entries

2010-03-06 11:26:45 -08:00

qnx4

qnx4: use hweight8

2009-12-16 07:20:18 -08:00

quota

quota: stop using QUOTA_OK / NO_QUOTA

2010-03-05 00:20:31 +01:00

ramfs

nommu: fix shared mmap after truncate shrinkage problems

2010-01-16 12:15:40 -08:00

reiserfs

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2010-03-05 13:20:53 -08:00

romfs

fix leak in romfs_fill_super()

2010-01-26 22:22:26 -05:00

smbfs

fs: Make unload_nls() NULL pointer safe

2009-09-24 07:47:42 -04:00

squashfs

Squashfs: get rid of obsolete definition in header file

2010-03-05 15:35:35 +00:00

sysfs

sysfs: Kill unused sysfs_sb variable.

2010-03-07 17:04:52 -08:00

sysv

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

ubifs

Revert "lib: build list_sort() only if needed"

2010-03-07 09:54:44 -08:00

udf

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2010-03-05 13:20:53 -08:00

ufs

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2010-03-05 13:20:53 -08:00

xfs

Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

2010-03-06 11:32:21 -08:00

aio.c

aio: remove unused field

2009-12-16 07:20:13 -08:00

anon_inodes.c

Sanitize f_flags helpers

2009-12-22 12:27:34 -05:00

attr.c

fs: use rlimit helpers

2010-03-06 11:26:29 -08:00

bad_inode.c

…

binfmt_aout.c

coredump: move dump_write() and dump_seek() into a header file

2010-03-06 11:26:45 -08:00

binfmt_elf_fdpic.c

coredump: pass mm->flags as a coredump parameter for consistency

2010-03-06 11:26:46 -08:00

binfmt_elf.c

coredump: pass mm->flags as a coredump parameter for consistency

2010-03-06 11:26:46 -08:00

binfmt_em86.c

…

binfmt_flat.c

fs: use rlimit helpers

2010-03-06 11:26:29 -08:00

binfmt_misc.c

…

binfmt_script.c

…

binfmt_som.c

Split 'flush_old_exec' into two functions

2010-01-29 08:22:01 -08:00

bio-integrity.c

block: fix bugs in bio-integrity mempool usage

2010-01-30 20:28:19 +01:00

bio.c

Revert "blkdev: fix merge_bvec_fn return value checks"

2010-03-02 19:17:34 +01:00

block_dev.c

freeze_bdev: don't deactivate successfully frozen MS_RDONLY sb

2010-02-07 03:06:21 -05:00

buffer.c

fs: buffer_head: remove kmem_cache constructor to reduce memory usage under slub

2010-03-12 15:52:27 -08:00

char_dev.c

fs/char_dev.c: remove useless loop

2009-09-24 07:21:03 -07:00

compat_binfmt_elf.c

elf coredump: replace ELF_CORE_EXTRA_* macros by functions

2010-03-06 11:26:45 -08:00

compat_ioctl.c

fs/compat_ioctl.c: suppress two warnings

2010-03-06 11:26:35 -08:00

compat.c

compat.c: Remove dependence on nfsd private headers

2009-12-14 18:12:10 -05:00

dcache.c

fix race in d_splice_alias()

2010-03-03 14:13:08 -05:00

dcookies.c

…

direct-io.c

dio: fix use-after-free

2009-12-17 04:52:13 -05:00

drop_caches.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

eventfd.c

eventfd - allow atomic read and waitqueue remove

2010-01-25 12:26:38 -02:00

eventpoll.c

anonfd: Allow making anon files read-only

2009-12-22 12:27:34 -05:00

exec.c

coredump: suppress uid comparison test if core output files are pipes

2010-03-06 11:26:46 -08:00

fcntl.c

fs: use rlimit helpers

2010-03-06 11:26:29 -08:00

fifo.c

…

file_table.c

vfs: take f_lock on modifying f_mode after open time

2010-03-06 11:26:25 -08:00

file.c

fs: use rlimit helpers

2010-03-06 11:26:29 -08:00

filesystems.c

fs: Mark get_filesystem_list() as __init function.

2009-04-20 23:02:52 -04:00

fs_struct.c

Get rid of indirect include of fs_struct.h

2009-03-31 23:00:27 -04:00

fs-writeback.c

pass writeback_control to ->write_inode

2010-03-05 13:25:52 -05:00

generic_acl.c

make generic_acl slightly more generic

2009-12-16 12:16:49 -05:00

inode.c

dquot: move dquot initialization responsibility into the filesystem

2010-03-05 00:20:30 +01:00

internal.h

Take vfsmount_lock to fs/internal.h

2010-03-03 14:07:59 -05:00

ioctl.c

__generic_block_fiemap(): fix for files bigger than 4GB

2009-11-12 07:26:01 -08:00

ioprio.c

…

Kconfig

Revert "task_struct: make journal_info conditional"

2009-12-17 13:23:24 -08:00

Kconfig.binfmt

…

libfs.c

libfs: Unexport and kill simple_prepare_write

2010-03-03 13:00:17 -05:00

locks.c

Switch may_open() and break_lease() to passing O_...

2010-03-03 13:00:21 -05:00

Makefile

[LogFS] add new flash file system

2009-11-20 20:13:39 +01:00

mbcache.c

…

mpage.c

ext4: Properly initialize the buffer_head state

2009-05-13 15:13:42 -04:00

namei.c

Fix a dumb typo - use of & instead of &&

2010-03-06 10:54:48 -08:00

namespace.c

vfs: add NOFOLLOW flag to umount(2)

2010-03-03 14:08:00 -05:00

nfsctl.c

Switch may_open() and break_lease() to passing O_...

2010-03-03 13:00:21 -05:00

no-block.c

…

open.c

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2010-03-05 13:20:53 -08:00

pipe.c

fs: no games with DCACHE_UNHASHED

2009-12-17 10:51:40 -05:00

pnode.c

Kill CL_PROPAGATION, sanitize fs/pnode.c:get_source()

2010-03-03 13:00:22 -05:00

pnode.h

VFS: Clean up shared mount flag propagation

2010-03-03 14:07:55 -05:00

posix_acl.c

…

read_write.c

sendfile(): check f_op.splice_write() rather than f_op.sendpage()

2009-11-04 09:09:52 +01:00

read_write.h

…

readdir.c

…

select.c

fs: use rlimit helpers

2010-03-06 11:26:29 -08:00

seq_file.c

seq_file: fix new kernel-doc warnings

2010-03-07 15:48:26 -08:00

signalfd.c

anonfd: Allow making anon files read-only

2009-12-22 12:27:34 -05:00

splice.c

sendfile(): check f_op.splice_write() rather than f_op.sendpage()

2009-11-04 09:09:52 +01:00

stack.c

VFS/fsstack: handle 32-bit smp + preempt + large files in fsstack_copy_inode_size

2009-12-17 10:58:17 -05:00

stat.c

Add unlocked version of inode_add_bytes() function

2009-12-23 13:33:54 +01:00

super.c

Mirror MS_KERNMOUNT in ->mnt_flags

2010-03-03 14:08:00 -05:00

sync.c

quota: move code from sync_quota_sb into vfs_quota_sync

2010-03-05 00:20:24 +01:00

timerfd.c

anonfd: Allow making anon files read-only

2009-12-22 12:27:34 -05:00

utimes.c

…

xattr_acl.c

VFS: Use GFP_NOFS in posix_acl_from_xattr()

2009-12-03 11:48:07 +00:00

xattr.c

sanitize xattr handler prototypes

2009-12-16 12:16:49 -05:00