From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: QEMU/KVM: make sure all vcpus are paused before saving
	state
Date: Wed, 9 Apr 2008 18:58:04 -0300
Message-ID: <20080409215804.GA7736@dmt>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Cc: kvm-devel <kvm-devel@lists.sourceforge.net>
To: Avi Kivity <avi@qumranet.com>
Return-path: <kvm-devel-bounces@lists.sourceforge.net>
Content-Disposition: inline
List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=kvm-devel>
List-Post: <mailto:kvm-devel@lists.sourceforge.net>
List-Help: <mailto:kvm-devel-request@lists.sourceforge.net?subject=help>
List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=subscribe>
Sender: kvm-devel-bounces@lists.sourceforge.net
Errors-To: kvm-devel-bounces@lists.sourceforge.net
List-Id: kvm.vger.kernel.org


Make sure that all threads are paused in userspace before saving machine
state.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>


--- kvm-userspace.io/qemu/qemu-kvm.c
+++ kvm-userspace.io/qemu/qemu-kvm.c
@@ -244,7 +244,7 @@ static int all_threads_paused(void)
     int i;
 
     for (i = 0; i < smp_cpus; ++i)
-	if (vcpu_info[i].stopped)
+	if (vcpu_info[i].stop)
 	    return 0;
     return 1;
 }
@@ -257,8 +257,12 @@ static void pause_all_threads(void)
 	vcpu_info[i].stop = 1;
 	pthread_kill(vcpu_info[i].thread, SIG_IPI);
     }
-    while (!all_threads_paused())
+    while (!all_threads_paused()) {
+	pthread_mutex_unlock(&qemu_mutex);
 	kvm_eat_signal(&io_signal_table, NULL, 1000);
+	pthread_mutex_lock(&qemu_mutex);
+	cpu_single_env = NULL;
+    }
 }
 
 static void resume_all_threads(void)

-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
Don't miss this year's exciting event. There's still time to save $100. 
Use priority code J8TL2D2. 
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone