From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52674) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQ7WF-0006Jy-S7 for qemu-devel@nongnu.org; Wed, 28 Jun 2017 03:36:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dQ7WC-000700-Ba for qemu-devel@nongnu.org; Wed, 28 Jun 2017 03:36:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38820) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dQ7WC-0006zu-5x for qemu-devel@nongnu.org; Wed, 28 Jun 2017 03:36:08 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 408AB804F1 for ; Wed, 28 Jun 2017 07:36:07 +0000 (UTC) From: Juan Quintela In-Reply-To: <1498472935-14461-1-git-send-email-peterx@redhat.com> (Peter Xu's message of "Mon, 26 Jun 2017 18:28:55 +0800") References: <1498472935-14461-1-git-send-email-peterx@redhat.com> Reply-To: quintela@redhat.com Date: Wed, 28 Jun 2017 09:36:02 +0200 Message-ID: <87vang7ee5.fsf@secure.mitica> MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [Qemu-devel] [PATCH] migration: add "return-path" capability List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Xu Cc: qemu-devel@nongnu.org, Laurent Vivier , "Daniel P . Berrange" , "Dr . David Alan Gilbert" Peter Xu wrote: > When this capability is enabled, QEMU will use the return path even for > precopy migration. This is helpful at least in one case when destination > failed to load the image while source quited without confirmation. With > return path, source will wait for the last response from destination, > and if destination fails, it'll fail the migration on source, then the > guest can be run again on the source (rather than assuming to be good, > then the guest will be lost after source quits). > > It needs to be enabled explicitly on source, otherwise disabled. > > Signed-off-by: Peter Xu Reviewed-by: Juan Quintela