commit 7e8660032cd21c1bdc4160b8fab7deec62e1aa12
author Kazuya Saito <saito.kazuya@jp.fujitsu.com> Fri Mar 22 17:26:59 2013 +0900
committer Stefan Hajnoczi <stefanha@redhat.com> Thu Mar 28 14:20:58 2013 +0100
tree 236f8c569e5b04139b2a009061c0e4208b248954
parent a46b24fd5dfd6814bafa65e51d8da86ce8eef7f5

vl: add runstate_set tracepoint

This patch enables us to know RunState transition. It will be userful
for investigation when the trouble occured in special event such like
live migration, shutdown, suspend, and so on.

Signed-off-by: Kazuya Saito <saito.kazuya@jp.fujitsu.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

trace-events

diff --git a/trace-events b/trace-events
index 406fe5f..85dd49c 100644
--- a/trace-events
+++ b/trace-events
@@ -474,6 +474,7 @@
 # vl.c
 vm_state_notify(int running, int reason) "running %d reason %d"
 load_file(const char *name, const char *path) "name %s location %s"
+runstate_set(int new_state) "new state %d"
 
 # block/qcow2.c
 qcow2_writev_start_req(void *co, int64_t sector, int nb_sectors) "co %p sector %" PRIx64 " nb_sectors %d"

vl.c

diff --git a/vl.c b/vl.c
index 7643f16..770cb7f 100644
--- a/vl.c
+++ b/vl.c
@@ -642,7 +642,7 @@
                 RunState_lookup[new_state]);
         abort();
     }
-
+    trace_runstate_set(new_state);
     current_run_state = new_state;
 }