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| author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2005-11-05 17:25:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-14 19:55:17 -0800 |
| commit | bf0f2e23834e2bf7d64b467ef07095b1c7e2c04b (patch) | |
| tree | 0a652a8e4cc51f50139d892cee17f7a699c4afa4 /include/asm-x86_64 | |
| parent | 8e0d4f4e9132ae6e353f9cf27261627bcc7c65cc (diff) | |
| download | blackbird-op-linux-bf0f2e23834e2bf7d64b467ef07095b1c7e2c04b.tar.gz blackbird-op-linux-bf0f2e23834e2bf7d64b467ef07095b1c7e2c04b.zip | |
[PATCH] x86_64: Set ____cacheline_maxaligned_in_smp alignment to 128 bytes
The current value was correct before the introduction of Intel EM64T support -
but now L1_CACHE_SHIFT_MAX can be less than L1_CACHE_SHIFT, which _is_ funny!
Between the few users of ____cacheline_maxaligned_in_smp, we also have (for
example) rcu_ctrlblk, and struct zone, with zone->{lru_,}lock. I.e. we have
a lot of excess cacheline bouncing on them.
No correctness issues, obviously. So this could even be merged for 2.6.14
(I'm not a fan of this idea, though).
CC: Andi Kleen <ak@suse.de>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64')
| -rw-r--r-- | include/asm-x86_64/cache.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-x86_64/cache.h b/include/asm-x86_64/cache.h index eda62bae1240..33e53424128b 100644 --- a/include/asm-x86_64/cache.h +++ b/include/asm-x86_64/cache.h @@ -9,6 +9,6 @@ /* L1 cache line size */ #define L1_CACHE_SHIFT (CONFIG_X86_L1_CACHE_SHIFT) #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) -#define L1_CACHE_SHIFT_MAX 6 /* largest L1 which this arch supports */ +#define L1_CACHE_SHIFT_MAX 7 /* largest L1 which this arch supports */ #endif |
