From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47413) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VZLLX-0006S6-N7 for qemu-devel@nongnu.org; Thu, 24 Oct 2013 09:53:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VZLLP-00068u-9J for qemu-devel@nongnu.org; Thu, 24 Oct 2013 09:53:07 -0400 Received: from mail-wi0-x22f.google.com ([2a00:1450:400c:c05::22f]:51471) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VZLLP-00068n-1B for qemu-devel@nongnu.org; Thu, 24 Oct 2013 09:52:59 -0400 Received: by mail-wi0-f175.google.com with SMTP id hm4so9043723wib.2 for ; Thu, 24 Oct 2013 06:52:58 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <52692636.3080200@redhat.com> Date: Thu, 24 Oct 2013 14:52:54 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <1382412341-1173-1-git-send-email-lilei@linux.vnet.ibm.com> <1382412341-1173-3-git-send-email-lilei@linux.vnet.ibm.com> In-Reply-To: <1382412341-1173-3-git-send-email-lilei@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 02/17] QAPI: introduce magration capability unix_page_flipping List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Lei Li Cc: aarcange@redhat.com, aliguori@us.ibm.com, quintela@redhat.com, qemu-devel@nongnu.org, mrhines@linux.vnet.ibm.com, mdroth@linux.vnet.ibm.com, lagarcia@br.ibm.com, rcj@linux.vnet.ibm.com Il 22/10/2013 04:25, Lei Li ha scritto: > +# @unix-page-flipping: If enabled, QEMU will support localhost migration. This > +# feature allows live upgrade of a running QEMU instance by doing localhost > +# migration with page flipping. It requires the source and destination > +# are both on localhost. Disabled by default. (since 1.7) > +# If enabled, QEMU can optimize migration when the destination is a QEMU process that runs on the same host as the source (as is the case for live upgrade). If the migration transport is a Unix socket, QEMU will flip RAM pages directly to the destination, so that memory is only allocated twice for the source and destination processes. Disabled by default. (since 1.8) Paolo