diff options
| author | Richard Kennedy <richard@rsk.demon.co.uk> | 2010-10-26 14:21:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 16:52:09 -0700 |
| commit | 182fea8f48332de085c0ae936605cb72671db9f2 (patch) | |
| tree | 6938047591e9077c416b972c176d4d1d716d95a7 /lib/rwsem.c | |
| parent | ea05c8444e451f1cfbf78c68733e717ad7b8602b (diff) | |
mm: remove alignment padding from anon_vma on (some) 64 bit builds
Reorder structure anon_vma to remove alignment padding on 64 builds when
(CONFIG_KSM || CONFIG_MIGRATION).
This will shrink the size of the anon_vma structure from 40 to 32 bytes
& allow more objects per slab in its kmem_cache.
Under slub the objects in the anon_vma kmem_cache will then be 40 bytes
with 102 objects per slab. (On v2.6.36 without this patch,the size is 48
bytes and 85 objects/slab.)
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
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>
Diffstat (limited to 'lib/rwsem.c')
0 files changed, 0 insertions, 0 deletions