aboutsummaryrefslogtreecommitdiff
path: root/arch/x86_64/kernel/init_task.c
diff options
context:
space:
mode:
authorRavikiran G Thirumalai <kiran@scalex86.org>2006-01-08 01:01:27 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:13:38 -0800
commit22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05 (patch)
tree3887dc6f1eeb658d773be037971b98d6f5fb3dd7 /arch/x86_64/kernel/init_task.c
parent6d524aed1f50b2b1d5b4ad5a4e2fe3f38106d0a6 (diff)
downloadlinux-2.6.34-ux500-22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05.tar.gz
[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 'arch/x86_64/kernel/init_task.c')
-rw-r--r--arch/x86_64/kernel/init_task.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/init_task.c b/arch/x86_64/kernel/init_task.c
index e0ba5c1043f..ce31d904d60 100644
--- a/arch/x86_64/kernel/init_task.c
+++ b/arch/x86_64/kernel/init_task.c
@@ -44,6 +44,6 @@ EXPORT_SYMBOL(init_task);
* section. Since TSS's are completely CPU-local, we want them
* on exact cacheline boundaries, to eliminate cacheline ping-pong.
*/
-DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_maxaligned_in_smp = INIT_TSS;
+DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS;
#define ALIGN_TO_4K __attribute__((section(".data.init_task")))