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| author | Ravikiran G Thirumalai <kiran@scalex86.org> | 2006-01-11 22:46:15 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:05:01 -0800 |
| commit | 5fd63b308569060ffa40af52ed122d9734111bff (patch) | |
| tree | 746c2701ec42374b1ec389a6af0d438c9105a9d7 | |
| parent | 99f7b77d3c62045bb47dfc4228a2341ba71bff1d (diff) | |
| download | linux-5fd63b308569060ffa40af52ed122d9734111bff.tar.bz2 | |
[PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_align
vSMP specific alignment patch to
1. Define INTERNODE_CACHE_SHIFT for vSMP
2. Use this for alignment of critical structures
3. Use INTERNODE_CACHE_SHIFT for ARCH_MIN_TASKALIGN,
and let the slab align task_struct allocations to the internode cacheline size
4. Introduce and use ARCH_MIN_MMSTRUCT_ALIGN for mm_struct slab allocations.
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Signed-off-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/asm-x86_64/cache.h | 12 | ||||
| -rw-r--r-- | include/asm-x86_64/processor.h | 6 | ||||
| -rw-r--r-- | kernel/fork.c | 6 |
3 files changed, 23 insertions, 1 deletions
diff --git a/include/asm-x86_64/cache.h b/include/asm-x86_64/cache.h index b4a2401de77b..263f0a211ed7 100644 --- a/include/asm-x86_64/cache.h +++ b/include/asm-x86_64/cache.h @@ -10,4 +10,16 @@ #define L1_CACHE_SHIFT (CONFIG_X86_L1_CACHE_SHIFT) #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) +#ifdef CONFIG_X86_VSMP + +/* vSMP Internode cacheline shift */ +#define INTERNODE_CACHE_SHIFT (12) +#ifdef CONFIG_SMP +#define __cacheline_aligned_in_smp \ + __attribute__((__aligned__(1 << (INTERNODE_CACHE_SHIFT)))) \ + __attribute__((__section__(".data.page_aligned"))) +#endif + +#endif + #endif diff --git a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h index 5cb151538cd5..394dd729752d 100644 --- a/include/asm-x86_64/processor.h +++ b/include/asm-x86_64/processor.h @@ -227,7 +227,13 @@ struct tss_struct { extern struct cpuinfo_x86 boot_cpu_data; DECLARE_PER_CPU(struct tss_struct,init_tss); +#ifdef CONFIG_X86_VSMP +#define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) +#define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) +#else #define ARCH_MIN_TASKALIGN 16 +#define ARCH_MIN_MMSTRUCT_ALIGN 0 +#endif struct thread_struct { unsigned long rsp0; diff --git a/kernel/fork.c b/kernel/fork.c index 16a776ec2c0b..4ae8cfc1c89c 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1298,6 +1298,10 @@ long do_fork(unsigned long clone_flags, return pid; } +#ifndef ARCH_MIN_MMSTRUCT_ALIGN +#define ARCH_MIN_MMSTRUCT_ALIGN 0 +#endif + void __init proc_caches_init(void) { sighand_cachep = kmem_cache_create("sighand_cache", @@ -1316,6 +1320,6 @@ void __init proc_caches_init(void) sizeof(struct vm_area_struct), 0, SLAB_PANIC, NULL, NULL); mm_cachep = kmem_cache_create("mm_struct", - sizeof(struct mm_struct), 0, + sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL); } |