tools/kvm_stat: re-animate display of dead guests

When filtering by guest (interactive commands 'p'/'g'), and the respective guest was destroyed, detect when the guest is up again through the guest name if possible. I.e. when displaying events for a specific guest, it is not necessary anymore to restart kvm_stat in case the guest is restarted. Signed-off-by: Stefan Raspl <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
josf · Aug 30, 2018 · c012a0f · c012a0f
1 parent 404517e
commit c012a0f
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat
@@ -1103,6 +1103,7 @@ class Tui(object):
             pid = self.stats.pid_filter
         self.screen.erase()
         gname = self.get_gname_from_pid(pid)
+        self._gname = gname
         if gname:
             gname = ('({})'.format(gname[:MAX_GUEST_NAME_LEN] + '...'
                                    if len(gname) > MAX_GUEST_NAME_LEN
@@ -1170,6 +1171,15 @@ class Tui(object):
             return sorted_items
 
         if not self._is_running_guest(self.stats.pid_filter):
+            if self._gname:
+                try: # ...to identify the guest by name in case it's back
+                    pids = self.get_pid_from_gname(self._gname)
+                    if len(pids) == 1:
+                        self._refresh_header(pids[0])
+                        self._update_pid(pids[0])
+                        return
+                except:
+                    pass
             self._display_guest_dead()
             # leave final data on screen
             return