diff --git a/llkd/README.md b/llkd/README.md
index 224e184..7cc7e1f 100644
--- a/llkd/README.md
+++ b/llkd/README.md
@@ -135,8 +135,9 @@
 default 2 minutes samples of threads for D or Z.
 
 #### ro.llk.stack
-default cma_alloc,__get_user_pages,bit_wait_io comma separated list of kernel
-symbols.  The string "*false*" is the equivalent to an *empty* list.
+default cma_alloc,__get_user_pages,bit_wait_io,wait_on_page_bit_killable
+comma separated list of kernel symbols.
+The string "*false*" is the equivalent to an *empty* list.
 Look for kernel stack symbols that if ever persistently present can
 indicate a subsystem is locked up.
 Beware, check does not on purpose do forward scheduling ABA except by polling
diff --git a/llkd/include/llkd.h b/llkd/include/llkd.h
index 1efa32b..7b7dbf9 100644
--- a/llkd/include/llkd.h
+++ b/llkd/include/llkd.h
@@ -50,7 +50,8 @@
 /* LLK_CHECK_MS_DEFAULT = actual timeout_ms / LLK_CHECKS_PER_TIMEOUT_DEFAULT */
 #define LLK_CHECKS_PER_TIMEOUT_DEFAULT 5
 #define LLK_CHECK_STACK_PROPERTY       "ro.llk.stack"
-#define LLK_CHECK_STACK_DEFAULT        "cma_alloc,__get_user_pages,bit_wait_io"
+#define LLK_CHECK_STACK_DEFAULT        \
+    "cma_alloc,__get_user_pages,bit_wait_io,wait_on_page_bit_killable"
 #define LLK_BLACKLIST_PROCESS_PROPERTY "ro.llk.blacklist.process"
 #define LLK_BLACKLIST_PROCESS_DEFAULT  \
     "0,1,2,init,[kthreadd],[khungtaskd],lmkd,llkd,watchdogd,[watchdogd],[watchdogd/0]"
diff --git a/llkd/libllkd.cpp b/llkd/libllkd.cpp
index 267da4a..7f47fc9 100644
--- a/llkd/libllkd.cpp
+++ b/llkd/libllkd.cpp
@@ -737,19 +737,21 @@
 
     auto kernel_stack = ReadFile(piddir + "/stack");
     if (kernel_stack.empty()) {
-        LOG(INFO) << piddir << "/stack empty comm=" << procp->getComm()
-                  << " cmdline=" << procp->getCmdline();
+        LOG(VERBOSE) << piddir << "/stack empty comm=" << procp->getComm()
+                     << " cmdline=" << procp->getCmdline();
         return false;
     }
     // A scheduling incident that should not reset count_stack
     if (kernel_stack.find(" cpu_worker_pools+0x") != std::string::npos) return false;
     char idx = -1;
     char match = -1;
+    std::string matched_stack_symbol = "<unknown>";
     for (const auto& stack : llkCheckStackSymbols) {
         if (++idx < 0) break;
         if ((kernel_stack.find(" "s + stack + "+0x") != std::string::npos) ||
             (kernel_stack.find(" "s + stack + ".cfi+0x") != std::string::npos)) {
             match = idx;
+            matched_stack_symbol = stack;
             break;
         }
     }
@@ -760,7 +762,9 @@
     }
     if (match == char(-1)) return false;
     procp->count_stack += llkCycle;
-    return procp->count_stack >= llkStateTimeoutMs[llkStateStack];
+    if (procp->count_stack < llkStateTimeoutMs[llkStateStack]) return false;
+    LOG(WARNING) << "Found " << matched_stack_symbol << " in stack for pid " << procp->pid;
+    return true;
 }
 #endif