diff --git a/linux/include/ihk/ihk_debug.h b/linux/include/ihk/ihk_debug.h
index 9b53dd7..90ea713 100644
--- a/linux/include/ihk/ihk_debug.h
+++ b/linux/include/ihk/ihk_debug.h
@@ -8,7 +8,7 @@
 #ifndef IHK_DEBUG_H_INCLUDED
 #define IHK_DEBUG_H_INCLUDED
 
-#define IHK_KMSG_SIZE            8192
+#define IHK_KMSG_SIZE            (1UL<<21)
 #define IHK_KMSG_HIGH_WATER_MARK (IHK_KMSG_SIZE / 2)
 #define IHK_KMSG_NOTIFY_DELAY    400 /* Unit is us, 400 us would avoid overloading fwrite of ihkmond */