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5df096d67e
linux/fs/ext3
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Pekka Enberg 5df096d67e ext3: allocate ->s_blockgroup_lock separately 
As spotted by kmemtrace, struct ext3_sb_info is 17152 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 ext3_sb_info
enough to fit a 1 KB slab cache so now we allocate 16 KB + 1 KB instead of
32 KB saving 15 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: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-08 08:31:00 -08:00
..
acl.c [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
acl.h [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
balloc.c CRED: Wrap task credential accesses in the Ext3 filesystem 2008-11-14 10:38:51 +11:00
bitmap.c fs: mark nibblemap const 2007-10-17 08:42:47 -07:00
dir.c ext3: Fix duplicate entries returned from getdents() system call 2008-10-25 22:37:44 -04:00
ext3_jbd.c ext3: replace remaining __FUNCTION__ occurrences 2008-04-28 08:58:45 -07:00
file.c generic block based fiemap implementation 2008-10-03 17:32:43 -04:00
fsync.c ext3: fdatasync should skip metadata writeout when overwriting 2008-04-28 08:58:43 -07:00
hash.c
ialloc.c nfsd race fixes: ext3 2008-12-31 18:07:44 -05:00
inode.c fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
ioctl.c ext3: add checks for errors from jbd 2008-10-23 08:55:01 -07:00
Kconfig fs/Kconfig: move ext2, ext3, ext4, JBD, JBD2 out 2008-10-20 11:43:59 -07:00
Makefile
namei.c fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
namei.h
resize.c ext3: don't try to resize if there are no reserved gdt blocks left 2008-10-20 08:52:37 -07:00
super.c ext3: allocate ->s_blockgroup_lock separately 2009-01-08 08:31:00 -08:00
symlink.c
xattr_security.c ext3: remove double definitions of xattr macros 2008-07-25 10:53:32 -07:00
xattr_trusted.c ext3: remove double definitions of xattr macros 2008-07-25 10:53:32 -07:00
xattr_user.c ext3: remove double definitions of xattr macros 2008-07-25 10:53:32 -07:00
xattr.c ext3/4: fix uninitialized bs in ext3/4_xattr_set_handle() 2008-05-14 19:11:14 -07:00
xattr.h make ext3_xattr_list() static 2008-04-28 08:58:44 -07:00