[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>

1 files changed, 6 insertions, 0 deletions

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;