diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index edf299c..d77d6a8 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -182,6 +182,7 @@ void pat_init_cache_modes(void)
 	u64 pat;
 
 	rdmsrl(MSR_IA32_CR_PAT, pat);
+	pr_info("read pat %0llx\n", pat);
 	pat_msg[32] = 0;
 	for (i = 7; i >= 0; i--) {
 		cache = pat_get_cache_mode((pat >> (i * 8)) & 7,
@@ -237,6 +238,8 @@ void pat_init(void)
 	if (!boot_pat_state)
 		rdmsrl(MSR_IA32_CR_PAT, boot_pat_state);
 
+	pr_info("about to write pat %0llx\n", pat);
+
 	wrmsrl(MSR_IA32_CR_PAT, pat);
 
 	if (boot_cpu)