From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:36751) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RD9id-0003l3-90 for qemu-devel@nongnu.org; Mon, 10 Oct 2011 02:52:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RD9ic-0000Kr-57 for qemu-devel@nongnu.org; Mon, 10 Oct 2011 02:52:11 -0400 Received: from fmmailgate01.web.de ([217.72.192.221]:52748) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RD9ib-0000Ka-Qk for qemu-devel@nongnu.org; Mon, 10 Oct 2011 02:52:10 -0400 Message-ID: <4E929618.4040403@web.de> Date: Mon, 10 Oct 2011 08:52:08 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <4E8ECA91.8040409@cn.fujitsu.com> <4E8ED167.1000705@siemens.com> <20111008151622.GA17181@amd.home.annexia.org> <4E916035.5050906@web.de> <20111009102338.GN16799@amd.home.annexia.org> <4E92568E.2010507@cn.fujitsu.com> In-Reply-To: <4E92568E.2010507@cn.fujitsu.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig26546E168CF5685FB4545E86" Sender: jan.kiszka@web.de Subject: Re: [Qemu-devel] [Question] dump memory when host pci device is used by guest List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Wen Congyang Cc: Luiz Capitulino , "Richard W.M. Jones" , qemu-devel This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig26546E168CF5685FB4545E86 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 2011-10-10 04:21, Wen Congyang wrote: > At 10/09/2011 06:23 PM, Richard W.M. Jones Write: >> On Sun, Oct 09, 2011 at 10:49:57AM +0200, Jan Kiszka wrote: >>> As explained in the other replies: It is way more future-proof to use= an >>> interface for this which was designed for it (remote gdb) instead of >>> artificially relaxing reasonable constraints of the migration mechani= sm >>> plus having to follow that format with the post-processing tool. >> >> Any interface that isn't "get this information off my production >> server *now*" so that I can get the server restarted, and send it to >> an expert to analyse -- is a poor interface, whether it was designed >> like that or not. Perhaps we don't have the right interface at all, >> but remote gdb is not it. >=20 > What about the following idea? >=20 > Introduce a new monitor command named dump, and this command accepts a = filename. > We can use almost all migration's code. We use this command to dump gue= st's > memory, so there is no need to check whether the guest has a unmigratab= le device. I do not want to reject this proposal categorically, but I would like to see the gdb path fail /wrt essential requirements first. So far I don't see it would. Jan --------------enig26546E168CF5685FB4545E86 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk6SlhgACgkQitSsb3rl5xTb9gCgpAN3soNBoEa+b1ujY7jODQPi 6xgAoLUPzQZLILtG8qLhASFO5IK21Yu+ =xyhL -----END PGP SIGNATURE----- --------------enig26546E168CF5685FB4545E86--