[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros
commit22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05
authorRavikiran G Thirumalai <kiran@scalex86.org>
Sun, 8 Jan 2006 09:01:27 +0000 (8 01:01 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Mon, 9 Jan 2006 04:13:38 +0000 (8 20:13 -0800)
tree3887dc6f1eeb658d773be037971b98d6f5fb3dd7
parent6d524aed1f50b2b1d5b4ad5a4e2fe3f38106d0a6
[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros

____cacheline_maxaligned_in_smp is currently used to align critical structures
and avoid false sharing.  It uses per-arch L1_CACHE_SHIFT_MAX and people find
L1_CACHE_SHIFT_MAX useless.

However, we have been using ____cacheline_maxaligned_in_smp to align
structures on the internode cacheline size.  As per Andi's suggestion,
following patch kills ____cacheline_maxaligned_in_smp and introduces
INTERNODE_CACHE_SHIFT, which defaults to L1_CACHE_SHIFT for all arches.
Arches needing L3/Internode cacheline alignment can define
INTERNODE_CACHE_SHIFT in the arch asm/cache.h.  Patch replaces
____cacheline_maxaligned_in_smp with ____cacheline_internodealigned_in_smp

With this patch, L1_CACHE_SHIFT_MAX can be killed

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/i386/kernel/init_task.c
arch/i386/kernel/irq.c
arch/x86_64/kernel/init_task.c
include/linux/cache.h
include/linux/ide.h
include/linux/mmzone.h
include/linux/rcupdate.h
kernel/rcupdate.c
mm/sparse.c