From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35068) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bpXHr-0003Wq-MC for qemu-devel@nongnu.org; Thu, 29 Sep 2016 05:05:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bpXHm-0007fz-KD for qemu-devel@nongnu.org; Thu, 29 Sep 2016 05:05:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33926) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bpXHm-0007fu-D4 for qemu-devel@nongnu.org; Thu, 29 Sep 2016 05:05:46 -0400 Date: Thu, 29 Sep 2016 10:05:41 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20160929090540.GB2030@work-vm> References: <20160928180044.GK2034@work-vm> <20160928221440.GK4316@var.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160928221440.GK4316@var.home> Subject: Re: [Qemu-devel] SLIRP migration? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Samuel Thibault Cc: jan.kiszka@siemens.com, qemu-devel@nongnu.org * Samuel Thibault (samuel.thibault@gnu.org) wrote: > Hello, > > Dr. David Alan Gilbert, on Wed 28 Sep 2016 19:00:45 +0100, wrote: > > I can see that migrating a VM with slirp makes sense (actually more > > commonly saving a VM with slirp to a file); but when that happens > > aren't you likely to lose all the network connections anyway? > > Yes. > > > If that's the case then why bother saving all the TCP state? > > Because there are not only network connections, actually the network > connections are *not* saved: slirp_state_save iterates only over > exec_list with ex_pty = 3, i.e. guestfwd to a device. Ah! Thanks for the explanation, that makes a lot more sense. Dave > > Samuel -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK