File: \coreos_pub\trunk\services\system\memmgr\x86\x86_mtrr.c
Function: int x86_set_mtrr();

if(!(SYSPAGE_ENTRY(cpuinfo)->flags & X86_CPU_MTRR) || (NUM_PROCESSORS > 1))
{
		return -1;
}

As far as I understand write combining for physical memory region can be enabled in case there is one CPU in system only
. Am I getting these lines right ?

Any plans to fix this in the nearest future ?