As per the documentation, Kernel Samepage Merging (available since 2.6.32) is a memory-saving de-duplication feature, enabled by CONFIG_KSM=y and activated via sysfs. More information can be found here: https://www.kernel.org/doc/Documentation/vm/ksm.txt
When enabled in the kernel, the default is to not do anything at all, until it is activated at run-time with: echo 1 > /sys/kernel/mm/ksm/run Signed-off-by: Daniel Díaz <daniel.d...@linaro.org> --- arch/x86/configs/x86_64_defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig index e32fc1f..8fd7396 100644 --- a/arch/x86/configs/x86_64_defconfig +++ b/arch/x86/configs/x86_64_defconfig @@ -48,6 +48,7 @@ CONFIG_MICROCODE_AMD=y CONFIG_X86_MSR=y CONFIG_X86_CPUID=y CONFIG_NUMA=y +CONFIG_KSM=y CONFIG_X86_CHECK_BIOS_CORRUPTION=y # CONFIG_MTRR_SANITIZER is not set CONFIG_EFI=y -- 2.7.4
