-#define fail_if_overlap(a,b,m1,m2) do { \
- if (chk_overlap(a, b)) { \
+#define fail_if_overlap(a,b,m1,m2) do { \
+ if (!doit) \
+ printf("check: %s[%lu..%lu] <> %s[%lu..%lu]\n", \
+ m1, a##_start_block, a##_end_block, \
+ m2, b##_start_block, b##_end_block); \
+ if (a##_end_block < a##_start_block) \
+ printf("Invalid start/end block # for %s\n", m1); \
+ if (b##_end_block < b##_start_block) \
+ printf("Invalid start/end block # for %s\n", m2); \
+ if (chk_overlap(a, b)) { \