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[PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_align

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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>
This commit is contained in:
Ravikiran G Thirumalai 2006-01-11 22:46:15 +01:00 committed by Linus Torvalds
parent 99f7b77d3c
commit 5fd63b3085
3 changed files with 23 additions and 1 deletions
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12
include/asm-x86_64/cache.h
View file

@ -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

6
include/asm-x86_64/processor.h
View file

@ -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;

6
kernel/fork.c
View file

@ -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);
}