--- a/hotspot/src/share/vm/gc/cms/compactibleFreeListSpace.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/cms/compactibleFreeListSpace.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -2206,13 +2206,13 @@
     }
     if (res == 0) {
       LogHandle(gc, verify) log;
-      log.info("Livelock: no rank reduction!");
-      log.info(" Current:  addr = " PTR_FORMAT ", size = " SIZE_FORMAT ", obj = %s, live = %s \n"
-               " Previous: addr = " PTR_FORMAT ", size = " SIZE_FORMAT ", obj = %s, live = %s \n",
+      log.error("Livelock: no rank reduction!");
+      log.error(" Current:  addr = " PTR_FORMAT ", size = " SIZE_FORMAT ", obj = %s, live = %s \n"
+                " Previous: addr = " PTR_FORMAT ", size = " SIZE_FORMAT ", obj = %s, live = %s \n",
         p2i(addr),       res,        was_obj      ?"true":"false", was_live      ?"true":"false",
         p2i(_last_addr), _last_size, _last_was_obj?"true":"false", _last_was_live?"true":"false");
       ResourceMark rm;
-      _sp->print_on(log.info_stream());
+      _sp->print_on(log.error_stream());
       guarantee(false, "Verification failed.");
     }
     _last_addr = addr;

--- a/hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -2224,8 +2224,8 @@
     if (!_marks->isMarked(addr)) {
       LogHandle(gc, verify) log;
       ResourceMark rm;
-      oop(addr)->print_on(log.info_stream());
-      log.info(" (" INTPTR_FORMAT " should have been marked)", p2i(addr));
+      oop(addr)->print_on(log.error_stream());
+      log.error(" (" INTPTR_FORMAT " should have been marked)", p2i(addr));
       _failed = true;
     }
     return true;
@@ -2350,9 +2350,9 @@
   verification_mark_bm()->iterate(&vcl);
   if (vcl.failed()) {
     LogHandle(gc, verify) log;
-    log.info("Verification failed");
+    log.error("Failed marking verification after remark");
     ResourceMark rm;
-    gch->print_on(log.info_stream());
+    gch->print_on(log.error_stream());
     fatal("CMS: failed marking verification after remark");
   }
 }
@@ -5880,8 +5880,8 @@
     if (!_cms_bm->isMarked(addr)) {
       LogHandle(gc, verify) log;
       ResourceMark rm;
-      oop(addr)->print_on(log.info_stream());
-      log.info(" (" INTPTR_FORMAT " should have been marked)", p2i(addr));
+      oop(addr)->print_on(log.error_stream());
+      log.error(" (" INTPTR_FORMAT " should have been marked)", p2i(addr));
       fatal("... aborting");
     }
   }
@@ -6661,8 +6661,8 @@
     if (!_cms_bm->isMarked(addr)) {
       LogHandle(gc, verify) log;
       ResourceMark rm;
-      oop(addr)->print_on(log.info_stream());
-      log.info(" (" INTPTR_FORMAT " should have been marked)", p2i(addr));
+      oop(addr)->print_on(log.error_stream());
+      log.error(" (" INTPTR_FORMAT " should have been marked)", p2i(addr));
       fatal("... aborting");
     }
 

--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -2147,8 +2147,8 @@
   virtual bool doHeapRegion(HeapRegion* hr) {
     unsigned region_gc_time_stamp = hr->get_gc_time_stamp();
     if (_gc_time_stamp != region_gc_time_stamp) {
-      log_info(gc, verify)("Region " HR_FORMAT " has GC time stamp = %d, expected %d", HR_FORMAT_PARAMS(hr),
-                           region_gc_time_stamp, _gc_time_stamp);
+      log_error(gc, verify)("Region " HR_FORMAT " has GC time stamp = %d, expected %d", HR_FORMAT_PARAMS(hr),
+                            region_gc_time_stamp, _gc_time_stamp);
       _failures = true;
     }
     return false;
@@ -5185,8 +5185,8 @@
   NoYoungRegionsClosure() : _success(true) { }
   bool doHeapRegion(HeapRegion* r) {
     if (r->is_young()) {
-      log_info(gc, verify)("Region [" PTR_FORMAT ", " PTR_FORMAT ") tagged as young",
-                           p2i(r->bottom()), p2i(r->end()));
+      log_error(gc, verify)("Region [" PTR_FORMAT ", " PTR_FORMAT ") tagged as young",
+                            p2i(r->bottom()), p2i(r->end()));
       _success = false;
     }
     return false;

--- a/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -758,7 +758,7 @@
        curr = curr->get_next_young_region()) {
     SurvRateGroup* group = curr->surv_rate_group();
     if (group == NULL && !curr->is_survivor()) {
-      log_info(gc, verify)("## %s: encountered NULL surv_rate_group", name);
+      log_error(gc, verify)("## %s: encountered NULL surv_rate_group", name);
       ret = false;
     }
 
@@ -766,12 +766,12 @@
       int age = curr->age_in_surv_rate_group();
 
       if (age < 0) {
-        log_info(gc, verify)("## %s: encountered negative age", name);
+        log_error(gc, verify)("## %s: encountered negative age", name);
         ret = false;
       }
 
       if (age <= prev_age) {
-        log_info(gc, verify)("## %s: region ages are not strictly increasing (%d, %d)", name, age, prev_age);
+        log_error(gc, verify)("## %s: region ages are not strictly increasing (%d, %d)", name, age, prev_age);
         ret = false;
       }
       prev_age = age;

--- a/hotspot/src/share/vm/gc/g1/g1HeapVerifier.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/g1/g1HeapVerifier.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -63,10 +63,10 @@
         LogHandle(gc, verify) log;
         log.info("Root location " PTR_FORMAT " points to dead obj " PTR_FORMAT, p2i(p), p2i(obj));
         if (_vo == VerifyOption_G1UseMarkWord) {
-          log.info("  Mark word: " PTR_FORMAT, p2i(obj->mark()));
+          log.error("  Mark word: " PTR_FORMAT, p2i(obj->mark()));
         }
         ResourceMark rm;
-        obj->print_on(log.info_stream());
+        obj->print_on(log.error_stream());
         _failures = true;
       }
     }
@@ -111,10 +111,10 @@
       // Verify that the strong code root list for this region
       // contains the nmethod
       if (!hrrs->strong_code_roots_list_contains(_nm)) {
-        log_info(gc, verify)("Code root location " PTR_FORMAT " "
-                             "from nmethod " PTR_FORMAT " not in strong "
-                             "code roots for region [" PTR_FORMAT "," PTR_FORMAT ")",
-                             p2i(p), p2i(_nm), p2i(hr->bottom()), p2i(hr->end()));
+        log_error(gc, verify)("Code root location " PTR_FORMAT " "
+                              "from nmethod " PTR_FORMAT " not in strong "
+                              "code roots for region [" PTR_FORMAT "," PTR_FORMAT ")",
+                              p2i(p), p2i(_nm), p2i(hr->bottom()), p2i(hr->end()));
         _failures = true;
       }
     }
@@ -292,8 +292,8 @@
         r->object_iterate(&not_dead_yet_cl);
         if (_vo != VerifyOption_G1UseNextMarking) {
           if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) {
-            log_info(gc, verify)("[" PTR_FORMAT "," PTR_FORMAT "] max_live_bytes " SIZE_FORMAT " < calculated " SIZE_FORMAT,
-                                 p2i(r->bottom()), p2i(r->end()), r->max_live_bytes(), not_dead_yet_cl.live_bytes());
+            log_error(gc, verify)("[" PTR_FORMAT "," PTR_FORMAT "] max_live_bytes " SIZE_FORMAT " < calculated " SIZE_FORMAT,
+                                  p2i(r->bottom()), p2i(r->end()), r->max_live_bytes(), not_dead_yet_cl.live_bytes());
             _failures = true;
           }
         } else {
@@ -402,13 +402,13 @@
   }
 
   if (failures) {
-    log_info(gc, verify)("Heap after failed verification:");
+    log_error(gc, verify)("Heap after failed verification:");
     // It helps to have the per-region information in the output to
     // help us track down what went wrong. This is why we call
     // print_extended_on() instead of print_on().
     LogHandle(gc, verify) log;
     ResourceMark rm;
-    _g1h->print_extended_on(log.info_stream());
+    _g1h->print_extended_on(log.error_stream());
   }
   guarantee(!failures, "there should not have been any failures");
 }
@@ -597,8 +597,8 @@
             "tams: " PTR_FORMAT " end: " PTR_FORMAT, p2i(tams), p2i(end));
   HeapWord* result = bitmap->getNextMarkedWordAddress(tams, end);
   if (result < end) {
-    log_info(gc, verify)("## wrong marked address on %s bitmap: " PTR_FORMAT, bitmap_name, p2i(result));
-    log_info(gc, verify)("## %s tams: " PTR_FORMAT " end: " PTR_FORMAT, bitmap_name, p2i(tams), p2i(end));
+    log_error(gc, verify)("## wrong marked address on %s bitmap: " PTR_FORMAT, bitmap_name, p2i(result));
+    log_error(gc, verify)("## %s tams: " PTR_FORMAT " end: " PTR_FORMAT, bitmap_name, p2i(tams), p2i(end));
     return false;
   }
   return true;
@@ -623,8 +623,8 @@
     res_n = verify_no_bits_over_tams("next", next_bitmap, ntams, end);
   }
   if (!res_p || !res_n) {
-    log_info(gc, verify)("#### Bitmap verification failed for " HR_FORMAT, HR_FORMAT_PARAMS(hr));
-    log_info(gc, verify)("#### Caller: %s", caller);
+    log_error(gc, verify)("#### Bitmap verification failed for " HR_FORMAT, HR_FORMAT_PARAMS(hr));
+    log_error(gc, verify)("#### Caller: %s", caller);
     return false;
   }
   return true;
@@ -676,41 +676,41 @@
     InCSetState cset_state = (InCSetState) G1CollectedHeap::heap()->_in_cset_fast_test.get_by_index(i);
     if (hr->is_humongous()) {
       if (hr->in_collection_set()) {
-        log_info(gc, verify)("## humongous region %u in CSet", i);
+        log_error(gc, verify)("## humongous region %u in CSet", i);
         _failures = true;
         return true;
       }
       if (cset_state.is_in_cset()) {
-        log_info(gc, verify)("## inconsistent cset state " CSETSTATE_FORMAT " for humongous region %u", cset_state.value(), i);
+        log_error(gc, verify)("## inconsistent cset state " CSETSTATE_FORMAT " for humongous region %u", cset_state.value(), i);
         _failures = true;
         return true;
       }
       if (hr->is_continues_humongous() && cset_state.is_humongous()) {
-        log_info(gc, verify)("## inconsistent cset state " CSETSTATE_FORMAT " for continues humongous region %u", cset_state.value(), i);
+        log_error(gc, verify)("## inconsistent cset state " CSETSTATE_FORMAT " for continues humongous region %u", cset_state.value(), i);
         _failures = true;
         return true;
       }
     } else {
       if (cset_state.is_humongous()) {
-        log_info(gc, verify)("## inconsistent cset state " CSETSTATE_FORMAT " for non-humongous region %u", cset_state.value(), i);
+        log_error(gc, verify)("## inconsistent cset state " CSETSTATE_FORMAT " for non-humongous region %u", cset_state.value(), i);
         _failures = true;
         return true;
       }
       if (hr->in_collection_set() != cset_state.is_in_cset()) {
-        log_info(gc, verify)("## in CSet %d / cset state " CSETSTATE_FORMAT " inconsistency for region %u",
+        log_error(gc, verify)("## in CSet %d / cset state " CSETSTATE_FORMAT " inconsistency for region %u",
                              hr->in_collection_set(), cset_state.value(), i);
         _failures = true;
         return true;
       }
       if (cset_state.is_in_cset()) {
         if (hr->is_young() != (cset_state.is_young())) {
-          log_info(gc, verify)("## is_young %d / cset state " CSETSTATE_FORMAT " inconsistency for region %u",
+          log_error(gc, verify)("## is_young %d / cset state " CSETSTATE_FORMAT " inconsistency for region %u",
                                hr->is_young(), cset_state.value(), i);
           _failures = true;
           return true;
         }
         if (hr->is_old() != (cset_state.is_old())) {
-          log_info(gc, verify)("## is_old %d / cset state " CSETSTATE_FORMAT " inconsistency for region %u",
+          log_error(gc, verify)("## is_old %d / cset state " CSETSTATE_FORMAT " inconsistency for region %u",
                                hr->is_old(), cset_state.value(), i);
           _failures = true;
           return true;

--- a/hotspot/src/share/vm/gc/g1/heapRegion.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/g1/heapRegion.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -479,7 +479,7 @@
         // Object is in the region. Check that its less than top
         if (_hr->top() <= (HeapWord*)obj) {
           // Object is above top
-          log_info(gc, verify)("Object " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ") is above top " PTR_FORMAT,
+          log_error(gc, verify)("Object " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ") is above top " PTR_FORMAT,
                                p2i(obj), p2i(_hr->bottom()), p2i(_hr->end()), p2i(_hr->top()));
           _failures = true;
           return;
@@ -513,19 +513,19 @@
     if (nm != NULL) {
       // Verify that the nemthod is live
       if (!nm->is_alive()) {
-        log_info(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] has dead nmethod " PTR_FORMAT " in its strong code roots",
-                             p2i(_hr->bottom()), p2i(_hr->end()), p2i(nm));
+        log_error(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] has dead nmethod " PTR_FORMAT " in its strong code roots",
+                              p2i(_hr->bottom()), p2i(_hr->end()), p2i(nm));
         _failures = true;
       } else {
         VerifyStrongCodeRootOopClosure oop_cl(_hr, nm);
         nm->oops_do(&oop_cl);
         if (!oop_cl.has_oops_in_region()) {
-          log_info(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] has nmethod " PTR_FORMAT " in its strong code roots with no pointers into region",
-                               p2i(_hr->bottom()), p2i(_hr->end()), p2i(nm));
+          log_error(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] has nmethod " PTR_FORMAT " in its strong code roots with no pointers into region",
+                                p2i(_hr->bottom()), p2i(_hr->end()), p2i(nm));
           _failures = true;
         } else if (oop_cl.failures()) {
-          log_info(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] has other failures for nmethod " PTR_FORMAT,
-                               p2i(_hr->bottom()), p2i(_hr->end()), p2i(nm));
+          log_error(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] has other failures for nmethod " PTR_FORMAT,
+                                p2i(_hr->bottom()), p2i(_hr->end()), p2i(nm));
           _failures = true;
         }
       }
@@ -558,8 +558,8 @@
   // on its strong code root list
   if (is_empty()) {
     if (strong_code_roots_length > 0) {
-      log_info(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] is empty but has " SIZE_FORMAT " code root entries",
-                           p2i(bottom()), p2i(end()), strong_code_roots_length);
+      log_error(gc, verify)("region [" PTR_FORMAT "," PTR_FORMAT "] is empty but has " SIZE_FORMAT " code root entries",
+                            p2i(bottom()), p2i(end()), strong_code_roots_length);
       *failures = true;
     }
     return;
@@ -567,8 +567,8 @@
 
   if (is_continues_humongous()) {
     if (strong_code_roots_length > 0) {
-      log_info(gc, verify)("region " HR_FORMAT " is a continuation of a humongous region but has " SIZE_FORMAT " code root entries",
-                           HR_FORMAT_PARAMS(this), strong_code_roots_length);
+      log_error(gc, verify)("region " HR_FORMAT " is a continuation of a humongous region but has " SIZE_FORMAT " code root entries",
+                            HR_FORMAT_PARAMS(this), strong_code_roots_length);
       *failures = true;
     }
     return;
@@ -661,26 +661,26 @@
           Mutex::_no_safepoint_check_flag);
 
         if (!_failures) {
-          log.info("----------");
+          log.error("----------");
         }
         ResourceMark rm;
         if (!_g1h->is_in_closed_subset(obj)) {
           HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
-          log.info("Field " PTR_FORMAT " of live obj " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ")",
+          log.error("Field " PTR_FORMAT " of live obj " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ")",
             p2i(p), p2i(_containing_obj), p2i(from->bottom()), p2i(from->end()));
-          print_object(log.info_stream(), _containing_obj);
-          log.info("points to obj " PTR_FORMAT " not in the heap", p2i(obj));
+          print_object(log.error_stream(), _containing_obj);
+          log.error("points to obj " PTR_FORMAT " not in the heap", p2i(obj));
         } else {
           HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
           HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj);
-          log.info("Field " PTR_FORMAT " of live obj " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ")",
+          log.error("Field " PTR_FORMAT " of live obj " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ")",
             p2i(p), p2i(_containing_obj), p2i(from->bottom()), p2i(from->end()));
-          print_object(log.info_stream(), _containing_obj);
-          log.info("points to dead obj " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ")",
+          print_object(log.error_stream(), _containing_obj);
+          log.error("points to dead obj " PTR_FORMAT " in region [" PTR_FORMAT ", " PTR_FORMAT ")",
             p2i(obj), p2i(to->bottom()), p2i(to->end()));
-          print_object(log.info_stream(), obj);
+          print_object(log.error_stream(), obj);
         }
-        log.info("----------");
+        log.error("----------");
         _failures = true;
         failed = true;
         _n_failures++;
@@ -730,17 +730,17 @@
             Mutex::_no_safepoint_check_flag);
 
           if (!_failures) {
-            log.info("----------");
+            log.error("----------");
           }
-          log.info("Missing rem set entry:");
-          log.info("Field " PTR_FORMAT " of obj " PTR_FORMAT ", in region " HR_FORMAT,
+          log.error("Missing rem set entry:");
+          log.error("Field " PTR_FORMAT " of obj " PTR_FORMAT ", in region " HR_FORMAT,
             p2i(p), p2i(_containing_obj), HR_FORMAT_PARAMS(from));
           ResourceMark rm;
-          _containing_obj->print_on(log.info_stream());
-          log.info("points to obj " PTR_FORMAT " in region " HR_FORMAT, p2i(obj), HR_FORMAT_PARAMS(to));
-          obj->print_on(log.info_stream());
-          log.info("Obj head CTE = %d, field CTE = %d.", cv_obj, cv_field);
-          log.info("----------");
+          _containing_obj->print_on(log.error_stream());
+          log.error("points to obj " PTR_FORMAT " in region " HR_FORMAT, p2i(obj), HR_FORMAT_PARAMS(to));
+          obj->print_on(log.error_stream());
+          log.error("Obj head CTE = %d, field CTE = %d.", cv_obj, cv_field);
+          log.error("----------");
           _failures = true;
           if (!failed) _n_failures++;
         }
@@ -774,13 +774,13 @@
                                    (vo == VerifyOption_G1UsePrevMarking &&
                                    ClassLoaderDataGraph::unload_list_contains(klass));
         if (!is_metaspace_object) {
-          log_info(gc, verify)("klass " PTR_FORMAT " of object " PTR_FORMAT " "
-                               "not metadata", p2i(klass), p2i(obj));
+          log_error(gc, verify)("klass " PTR_FORMAT " of object " PTR_FORMAT " "
+                                "not metadata", p2i(klass), p2i(obj));
           *failures = true;
           return;
         } else if (!klass->is_klass()) {
-          log_info(gc, verify)("klass " PTR_FORMAT " of object " PTR_FORMAT " "
-                               "not a klass", p2i(klass), p2i(obj));
+          log_error(gc, verify)("klass " PTR_FORMAT " of object " PTR_FORMAT " "
+                                "not a klass", p2i(klass), p2i(obj));
           *failures = true;
           return;
         } else {
@@ -811,7 +811,7 @@
           }
         }
       } else {
-        log_info(gc, verify)(PTR_FORMAT " not an oop", p2i(obj));
+        log_error(gc, verify)(PTR_FORMAT " not an oop", p2i(obj));
         *failures = true;
         return;
       }
@@ -827,13 +827,13 @@
   if (is_region_humongous) {
     oop obj = oop(this->humongous_start_region()->bottom());
     if ((HeapWord*)obj > bottom() || (HeapWord*)obj + obj->size() < bottom()) {
-      log_info(gc, verify)("this humongous region is not part of its' humongous object " PTR_FORMAT, p2i(obj));
+      log_error(gc, verify)("this humongous region is not part of its' humongous object " PTR_FORMAT, p2i(obj));
     }
   }
 
   if (!is_region_humongous && p != top()) {
-    log_info(gc, verify)("end of last object " PTR_FORMAT " "
-                         "does not match top " PTR_FORMAT, p2i(p), p2i(top()));
+    log_error(gc, verify)("end of last object " PTR_FORMAT " "
+                          "does not match top " PTR_FORMAT, p2i(p), p2i(top()));
     *failures = true;
     return;
   }
@@ -847,9 +847,9 @@
     HeapWord* addr_1 = p;
     HeapWord* b_start_1 = _bot_part.block_start_const(addr_1);
     if (b_start_1 != p) {
-      log_info(gc, verify)("BOT look up for top: " PTR_FORMAT " "
-                           " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
-                           p2i(addr_1), p2i(b_start_1), p2i(p));
+      log_error(gc, verify)("BOT look up for top: " PTR_FORMAT " "
+                            " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
+                            p2i(addr_1), p2i(b_start_1), p2i(p));
       *failures = true;
       return;
     }
@@ -859,9 +859,9 @@
     if (addr_2 < the_end) {
       HeapWord* b_start_2 = _bot_part.block_start_const(addr_2);
       if (b_start_2 != p) {
-        log_info(gc, verify)("BOT look up for top + 1: " PTR_FORMAT " "
-                             " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
-                             p2i(addr_2), p2i(b_start_2), p2i(p));
+        log_error(gc, verify)("BOT look up for top + 1: " PTR_FORMAT " "
+                              " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
+                              p2i(addr_2), p2i(b_start_2), p2i(p));
         *failures = true;
         return;
       }
@@ -873,9 +873,9 @@
     if (addr_3 < the_end) {
       HeapWord* b_start_3 = _bot_part.block_start_const(addr_3);
       if (b_start_3 != p) {
-        log_info(gc, verify)("BOT look up for top + diff: " PTR_FORMAT " "
-                             " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
-                             p2i(addr_3), p2i(b_start_3), p2i(p));
+        log_error(gc, verify)("BOT look up for top + diff: " PTR_FORMAT " "
+                              " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
+                              p2i(addr_3), p2i(b_start_3), p2i(p));
         *failures = true;
         return;
       }
@@ -885,9 +885,9 @@
     HeapWord* addr_4 = the_end - 1;
     HeapWord* b_start_4 = _bot_part.block_start_const(addr_4);
     if (b_start_4 != p) {
-      log_info(gc, verify)("BOT look up for end - 1: " PTR_FORMAT " "
-                           " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
-                           p2i(addr_4), p2i(b_start_4), p2i(p));
+      log_error(gc, verify)("BOT look up for end - 1: " PTR_FORMAT " "
+                            " yielded " PTR_FORMAT ", expecting " PTR_FORMAT,
+                            p2i(addr_4), p2i(b_start_4), p2i(p));
       *failures = true;
       return;
     }
@@ -924,7 +924,7 @@
           return;
         }
       } else {
-        log_info(gc, verify)(PTR_FORMAT " not an oop", p2i(obj));
+        log_error(gc, verify)(PTR_FORMAT " not an oop", p2i(obj));
         *failures = true;
         return;
       }

--- a/hotspot/src/share/vm/gc/g1/satbMarkQueue.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/g1/satbMarkQueue.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -221,13 +221,13 @@
 
 #ifdef ASSERT
 void SATBMarkQueueSet::dump_active_states(bool expected_active) {
-  log_info(gc, verify)("Expected SATB active state: %s", expected_active ? "ACTIVE" : "INACTIVE");
-  log_info(gc, verify)("Actual SATB active states:");
-  log_info(gc, verify)("  Queue set: %s", is_active() ? "ACTIVE" : "INACTIVE");
+  log_error(gc, verify)("Expected SATB active state: %s", expected_active ? "ACTIVE" : "INACTIVE");
+  log_error(gc, verify)("Actual SATB active states:");
+  log_error(gc, verify)("  Queue set: %s", is_active() ? "ACTIVE" : "INACTIVE");
   for (JavaThread* t = Threads::first(); t; t = t->next()) {
-    log_info(gc, verify)("  Thread \"%s\" queue: %s", t->name(), t->satb_mark_queue().is_active() ? "ACTIVE" : "INACTIVE");
+    log_error(gc, verify)("  Thread \"%s\" queue: %s", t->name(), t->satb_mark_queue().is_active() ? "ACTIVE" : "INACTIVE");
   }
-  log_info(gc, verify)("  Shared queue: %s", shared_satb_queue()->is_active() ? "ACTIVE" : "INACTIVE");
+  log_error(gc, verify)("  Shared queue: %s", shared_satb_queue()->is_active() ? "ACTIVE" : "INACTIVE");
 }
 
 void SATBMarkQueueSet::verify_active_states(bool expected_active) {

--- a/hotspot/src/share/vm/gc/g1/youngList.cpp	Wed Feb 10 22:22:48 2016 -0500
+++ b/hotspot/src/share/vm/gc/g1/youngList.cpp	Thu Feb 11 08:55:36 2016 +0100
@@ -99,10 +99,10 @@
   HeapRegion* last = NULL;
   while (curr != NULL) {
     if (!curr->is_young()) {
-      log_info(gc, verify)("### YOUNG REGION " PTR_FORMAT "-" PTR_FORMAT " "
-                           "incorrectly tagged (y: %d, surv: %d)",
-                           p2i(curr->bottom()), p2i(curr->end()),
-                           curr->is_young(), curr->is_survivor());
+      log_error(gc, verify)("### YOUNG REGION " PTR_FORMAT "-" PTR_FORMAT " "
+                            "incorrectly tagged (y: %d, surv: %d)",
+                            p2i(curr->bottom()), p2i(curr->end()),
+                            curr->is_young(), curr->is_survivor());
       ret = false;
     }
     ++length;
@@ -112,8 +112,8 @@
   ret = ret && (length == _length);
 
   if (!ret) {
-    log_info(gc, verify)("### YOUNG LIST seems not well formed!");
-    log_info(gc, verify)("###   list has %u entries, _length is %u", length, _length);
+    log_error(gc, verify)("### YOUNG LIST seems not well formed!");
+    log_error(gc, verify)("###   list has %u entries, _length is %u", length, _length);
   }
 
   return ret;
@@ -123,19 +123,19 @@
   bool ret = true;
 
   if (_length != 0) {
-    log_info(gc, verify)("### YOUNG LIST should have 0 length, not %u", _length);
+    log_error(gc, verify)("### YOUNG LIST should have 0 length, not %u", _length);
     ret = false;
   }
   if (check_sample && _last_sampled_rs_lengths != 0) {
-    log_info(gc, verify)("### YOUNG LIST has non-zero last sampled RS lengths");
+    log_error(gc, verify)("### YOUNG LIST has non-zero last sampled RS lengths");
     ret = false;
   }
   if (_head != NULL) {
-    log_info(gc, verify)("### YOUNG LIST does not have a NULL head");
+    log_error(gc, verify)("### YOUNG LIST does not have a NULL head");
     ret = false;
   }
   if (!ret) {
-    log_info(gc, verify)("### YOUNG LIST does not seem empty");
+    log_error(gc, verify)("### YOUNG LIST does not seem empty");
   }
 
   return ret;