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From: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>
To: qemu-devel@nongnu.org, quintela@redhat.com, peterx@redhat.com,
	lvivier@redhat.com, pbonzini@redhat.com
Subject: [Qemu-devel] [PATCH f0r 2.11] runstate/migrate: Two more transitions
Date: Fri,  4 Aug 2017 18:50:11 +0100	[thread overview]
Message-ID: <20170804175011.21944-1-dgilbert@redhat.com> (raw)

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

There's a race if someone does a 'stop' near the end of migrate;
the migration process goes through two runstates:
    'finish migrate'
    'postmigrate'

If the user issues a 'stop' between the two we end up with invalid
state transitions.
Add the transitions as valid.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 vl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/vl.c b/vl.c
index 99fcfa0442..bacb03f49d 100644
--- a/vl.c
+++ b/vl.c
@@ -621,6 +621,7 @@ static const RunStateTransition runstate_transitions_def[] = {
 
     { RUN_STATE_PAUSED, RUN_STATE_RUNNING },
     { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_PAUSED, RUN_STATE_POSTMIGRATE },
     { RUN_STATE_PAUSED, RUN_STATE_PRELAUNCH },
     { RUN_STATE_PAUSED, RUN_STATE_COLO},
 
@@ -633,6 +634,7 @@ static const RunStateTransition runstate_transitions_def[] = {
     { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },
 
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING },
+    { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PAUSED },
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE },
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PRELAUNCH },
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_COLO},
-- 
2.13.3

             reply	other threads:[~2017-08-04 17:50 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-04 17:50 Dr. David Alan Gilbert (git) [this message]
2017-08-07  7:21 ` [Qemu-devel] [PATCH f0r 2.11] runstate/migrate: Two more transitions Peter Xu
2017-08-07 12:25   ` Dr. David Alan Gilbert
2017-08-08  1:59     ` Peter Xu
2017-08-08  7:02 ` Juan Quintela
2017-08-08  7:13   ` Peter Xu
2017-09-06 13:40 ` Dr. David Alan Gilbert
2017-09-09 13:57   ` Paolo Bonzini

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