xpmem: support large page

1. try to use as large page as possible on attach
2. pre-map resident remote pages on attach

Change-Id: I5580682a4199e94085a9bad9ce3958a0f14cdcea

test/issues/1259/util.h

@@ -0,0 +1,28 @@
+#ifndef __UTIL_H_INCLUDED__
+#define __UTIL_H_INCLUDED__
+
+#define CHKANDJUMP(cond, err, ...) do { \
+	if (cond) {			\
+		printf(__VA_ARGS__);   \
+		ret = err;		\
+		goto out;		\
+	}				\
+} while (0)
+
+#define _OKNG(verb, jump, cond, fmt, args...) do {	\
+	if (cond) {					\
+		if (verb)				\
+			printf("[ OK ] " fmt, ##args);	\
+	} else {					\
+		printf("[ NG ] " fmt, ##args);		\
+		if (jump)				\
+			goto out;			\
+	}						\
+} while (0)
+
+#define OKNG(args...) _OKNG(1, 1, ##args)
+#define NG(args...) _OKNG(0, 1, ##args)
+#define OKNGNOJUMP(args...) _OKNG(1, 0, ##args)
+
+#endif
+