From: Stefan Raspl <stefan.raspl@de.ibm.com>
Date: Fri, 24 Aug 2018 12:04:01 +0000 (+0200)
Subject: tools/kvm_stat: re-animate display of dead guests
X-Git-Tag: v4.19~218^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c012a0f2677529a0ae8f53a15bd7c61dc4ca5b5e;p=platform%2Fkernel%2Flinux-rpi.git

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 <raspl@linux.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
---

diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat
index 5c2422b..439b8a2 100755
--- 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