[PATCH] x86_64: Fixup read_mostly section on internode cache line size for vSMP

Fixup the read mostly section to start at internode cacheline boundary.

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: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 4310b4a311a55a79326169751c93b3362d348b6f..7df2fe1844be737aee6f377906ddc39bc6c0fcf1 100644 (file)
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -136,6 +136,11 @@ config X86_L1_CACHE_SHIFT
        default "7" if GENERIC_CPU || MPSC
        default "6" if MK8
 
+config X86_INTERNODE_CACHE_BYTES
+       int
+       default "4096" if X86_VSMP
+       default X86_L1_CACHE_BYTES if !X86_VSMP
+
 config X86_TSC
        bool
        default y

diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S
index 39ff0708f803a208288913383fd0fdbd1b1d366a..b81f473c4a19bd4cec12f02bae4764fc30d436cf 100644 (file)
--- a/arch/x86_64/kernel/vmlinux.lds.S
+++ b/arch/x86_64/kernel/vmlinux.lds.S
@@ -65,7 +65,7 @@ SECTIONS
   .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
        *(.data.cacheline_aligned)
   }
-  . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
+  . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
   .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
        *(.data.read_mostly)
   }