printk.time=y

README.md

@@ -568,6 +568,7 @@ says:
 - <https://github.com/cirosantilli/chat/issues/31>
 - <https://rwmj.wordpress.com/2016/03/17/tracing-qemu-guest-execution/>
 - `qemu/docs/tracing.txt` and `qemu/docs/replay.txt`
+- <https://stackoverflow.com/questions/39149446/how-to-use-qemus-simple-trace-backend/46497873#46497873>
 
 Naive attempt: add to `S99`:
 

runqemu

@@ -8,8 +8,9 @@ debug=false
 debug_qemu=''
 kgdb=false
 nographic=false
-# norandmaps: reduce randomization to make our lives easier.
-extra_append='norandmaps'
+# norandmaps: Don't use address space randomization. Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space.
+# printk.time=y: log in format: "[time ] msg" for all printk messages.
+extra_append='norandmaps printk.time=y'
 extra_flags=''
 while getopts a:de:knqt: OPT; do
   case "$OPT" in