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authorRavikiran G Thirumalai <kiran@scalex86.org>2006-01-08 12:01:27 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-09 07:13:38 +0300
commit22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05 (patch)
tree3887dc6f1eeb658d773be037971b98d6f5fb3dd7 /mm/sparse.c
parent6d524aed1f50b2b1d5b4ad5a4e2fe3f38106d0a6 (diff)
downloadlinux-22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05.tar.xz
[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>
Diffstat (limited to 'mm/sparse.c')
-rw-r--r--mm/sparse.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/sparse.c b/mm/sparse.c
index 72079b538e2d..0a51f36ba3a1 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -18,10 +18,10 @@
*/
#ifdef CONFIG_SPARSEMEM_EXTREME
struct mem_section *mem_section[NR_SECTION_ROOTS]
- ____cacheline_maxaligned_in_smp;
+ ____cacheline_internodealigned_in_smp;
#else
struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT]
- ____cacheline_maxaligned_in_smp;
+ ____cacheline_internodealigned_in_smp;
#endif
EXPORT_SYMBOL(mem_section);