Pekka Enberg 705895b611 ext4: allocate ->s_blockgroup_lock separately ... As spotted by kmemtrace, struct ext4_sb_info is 17664 bytes on 64-bit which makes it a very bad fit for SLAB allocators. The culprit of the wasted memory is ->s_blockgroup_lock which can be as big as 16 KB when NR_CPUS >= 32. To fix that, allocate ->s_blockgroup_lock, which fits nicely in a order 2 page in the worst case, separately. This shinks down struct ext4_sb_info enough to fit a 2 KB slab cache so now we allocate 16 KB + 2 KB instead of 32 KB saving 14 KB of memory. Acked-by: Andreas Dilger <adilger@sun.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>		2009-02-15 18:07:52 -05:00
..
acl.c	[PATCH] sanitize ->permission() prototype	2008-07-26 20:53:14 -04:00
acl.h	ext4: Rename ext4dev to ext4	2008-10-10 20:02:48 -04:00
balloc.c	ext4: remove call to ext4_group_desc() in ext4_group_used_meta_blocks()	2009-02-06 16:23:37 -05:00
bitmap.c	ext4: Change unsigned long to unsigned int	2008-11-05 00:14:04 -05:00
dir.c	ext4: New rec_len encoding for very large blocksizes	2009-02-14 23:01:36 -05:00
ext4_extents.h	ext4: Remove i_ext_generation from ext4_inode_info structure	2008-11-04 18:46:03 -05:00
ext4_i.h	ext4: Remove stale block allocator references from ext4.h	2009-02-06 16:23:37 -05:00
ext4_jbd2.c	ext4: Allow ext4 to run without a journal	2009-01-07 00:06:22 -05:00
ext4_jbd2.h	ext4: Remove "extents" mount option	2009-01-06 14:53:16 -05:00
ext4_sb.h	ext4: allocate ->s_blockgroup_lock separately	2009-02-15 18:07:52 -05:00
ext4.h	ext4: New rec_len encoding for very large blocksizes	2009-02-14 23:01:36 -05:00
extents.c	ext4: fix header check in ext4_ext_search_right() for deep extent trees.	2009-03-10 18:18:47 -04:00
file.c	ext4: sparse fixes	2008-11-22 15:04:59 -05:00
fsync.c	ext4: Add debugging markers that can be used by systemtap	2008-10-05 20:50:06 -04:00
group.h	ext4: Rename read_block_bitmap() to ext4_read_block_bitmap()	2008-07-11 19:27:31 -04:00
hash.c	ext4: Add support for non-native signed/unsigned htree hash algorithms	2008-10-28 13:21:44 -04:00
ialloc.c	ext4: Use lowercase names of quota functions	2009-03-26 02:18:36 +01:00
inode.c	ext4: Use lowercase names of quota functions	2009-03-26 02:18:36 +01:00
ioctl.c	ext4: Allow ext4 to run without a journal	2009-01-07 00:06:22 -05:00
Kconfig	fs/Kconfig: move ext2, ext3, ext4, JBD, JBD2 out	2008-10-20 11:43:59 -07:00
Makefile	ext4: Rename ext4dev to ext4	2008-10-10 20:02:48 -04:00
mballoc.c	ext4: Use lowercase names of quota functions	2009-03-26 02:18:36 +01:00
mballoc.h	ext4: Remove stale block allocator references from ext4.h	2009-02-06 16:23:37 -05:00
migrate.c	ext4: Fix NULL dereference in ext4_ext_migrate()'s error handling	2009-02-15 20:02:19 -05:00
namei.c	ext4: New rec_len encoding for very large blocksizes	2009-02-14 23:01:36 -05:00
namei.h	[PATCH] ext4: rename ext4 symbols to avoid duplication of ext3 symbols	2006-10-11 11:14:15 -07:00
resize.c	ext4: Initialize the new group descriptor when resizing the filesystem	2009-01-26 19:06:41 -05:00
super.c	ext4: allocate ->s_blockgroup_lock separately	2009-02-15 18:07:52 -05:00
symlink.c	ext4: Rename ext4dev to ext4	2008-10-10 20:02:48 -04:00
xattr_security.c	ext4: move headers out of include/linux	2008-04-29 18:13:32 -04:00
xattr_trusted.c	ext4: remove double definitions of xattr macros	2008-07-11 19:27:31 -04:00
xattr_user.c	ext4: remove double definitions of xattr macros	2008-07-11 19:27:31 -04:00
xattr.c	ext4: Use lowercase names of quota functions	2009-03-26 02:18:36 +01:00
xattr.h	ext4: Rename ext4dev to ext4	2008-10-10 20:02:48 -04:00