Explain the upcoming delay by printing a message when the kernel

is about to begin testing memory.

Reviewed by:	dteske, adri
Approved by:	cperciva
MFC after:	1 week

sys/amd64/amd64/machdep.c

@@ -1532,6 +1532,8 @@ getmemsize(caddr_t kmdp, u_int64_t first)
 			if (memtest == 0)
 				goto skip_memtest;
 
+			printf("testing memory...\n");
+
 			/*
 			 * map page into kernel: valid, read/write,non-cacheable
 			 */

sys/i386/i386/machdep.c

@@ -2459,6 +2459,8 @@ getmemsize(int first)
 			if (memtest == 0)
 				goto skip_memtest;
 
+			printf("testing memory...\n");
+
 			/*
 			 * map page into kernel: valid, read/write,non-cacheable
 			 */

sys/pc98/pc98/machdep.c

@@ -2042,6 +2042,8 @@ getmemsize(int first)
 			if (memtest == 0)
 				goto skip_memtest;
 
+			printf("testing memory...\n");
+
 			/*
 			 * map page into kernel: valid, read/write,non-cacheable
 			 */