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authorRavikiran G Thirumalai <kiran@scalex86.org>2006-01-08 04:01:27 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 23:13:38 -0500
commit22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05 (patch)
tree3887dc6f1eeb658d773be037971b98d6f5fb3dd7 /include/linux/rcupdate.h
parent6d524aed1f50b2b1d5b4ad5a4e2fe3f38106d0a6 (diff)
[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 'include/linux/rcupdate.h')
-rw-r--r--include/linux/rcupdate.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index a471f3bb713e..51747cd88d1a 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -65,7 +65,7 @@ struct rcu_ctrlblk {
65 long cur; /* Current batch number. */ 65 long cur; /* Current batch number. */
66 long completed; /* Number of the last completed batch */ 66 long completed; /* Number of the last completed batch */
67 int next_pending; /* Is the next batch already waiting? */ 67 int next_pending; /* Is the next batch already waiting? */
68} ____cacheline_maxaligned_in_smp; 68} ____cacheline_internodealigned_in_smp;
69 69
70/* Is batch a before batch b ? */ 70/* Is batch a before batch b ? */
71static inline int rcu_batch_before(long a, long b) 71static inline int rcu_batch_before(long a, long b)