From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44290) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZKMKX-00042V-8M for qemu-devel@nongnu.org; Wed, 29 Jul 2015 04:03:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZKMKQ-0004XF-Qk for qemu-devel@nongnu.org; Wed, 29 Jul 2015 04:03:13 -0400 Received: from mail-wi0-f181.google.com ([209.85.212.181]:37300) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZKMKQ-0004WZ-Lm for qemu-devel@nongnu.org; Wed, 29 Jul 2015 04:03:06 -0400 Received: by wibud3 with SMTP id ud3so14250011wib.0 for ; Wed, 29 Jul 2015 01:03:05 -0700 (PDT) Date: Wed, 29 Jul 2015 10:03:03 +0200 From: Eduardo Otubo Message-ID: <20150729080303.GA7667@vader> References: <20150728132213.GA1603@vader> <20150728151946.GF2247@work-vm> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="mP3DRpeJDSE+ciuQ" Content-Disposition: inline In-Reply-To: <20150728151946.GF2247@work-vm> Subject: Re: [Qemu-devel] Live migration hangs after migration to remote host List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Dr. David Alan Gilbert" Cc: Qemu-devel --mP3DRpeJDSE+ciuQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jul 28, 2015 at 04=3D19=3D46PM +0100, Dr. David Alan Gilbert wrote: > * Eduardo Otubo (eduardo.otubo@profitbricks.com) wrote: > > Hello all, > >=20 > > I'm facing a weird behavior on my tests: I am able to live migrate > > between two virtual machines on my localhost, but not to another > > machine, both using tcp. > >=20 > > * I am using the same arguments on the command line; > > * Both virtual machines uses the same qcow2 file visible through NFS; > > * Both machines are in the same subnet; > > * Migration is being done from intel to intel; > > * Same version of Qemu (github master - f8787f8723); > >=20 > > Using all above I am able to live migrate on the same host: between two > > vms on local host or between two vms in the remote host; but when > > migrating from local to remote, the guest hangs. I still can access its > > console via ctrl+alt+2, though, and everything seems to be normal. If I > > issue a reboote via console on the remote, the guest gets back to > > normal. > >=20 > > Am I missing something here? >=20 > Just checking, but are you saying that as far as qemu is concerned, the m= igration > is happy, it's just the guest that's hung? That's exactly the case. The console (via ctrl+alt+2) is active and responding to all commands normally, but the screen (ctrl+alt+1) is frozen and I can't interact with it at all. >=20 > Are the host clocks on the two hosts very close (there are lots of > weird corner cases with mismatched clocks) - same time zone? Yep. Both machines are in the same room and have the clock sync'ed. >=20 > Are you using cache=3Dnone (given that it's NFS shared) I wasn't. But I tried again with cache=3Dnone and I got exactly the same thing. Also, I tried with stable-2.2 branch and got the same behavior. I really think that's very unlikely to have unstable code of such an important feature upstream, or on a stable- branch. Most probable thing is that I have something wrong on my environment. Anyway, I'll keep tetsing different stable- branches until I find something that works for me. I'll keep the mailing list posted. Thanks for the light! --=20 Eduardo Otubo ProfitBricks GmbH --mP3DRpeJDSE+ciuQ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAEBAgAGBQJVuIi3AAoJEP0M/1sS+L0vQygH/3nkWDNf2YWhKGnFxKNUams/ 59Yo1HxtBiJNgsF6Hr10gyAP5ISVEpQO0WbXChp1nCkepo0zxu61o1rZP6KtR3PZ 1fIF8KQnZjM9+GQrRpa28P3xu2LEtyy8MeTBwgh2RdZV/taYgnP8PEokyvNTPbhn USryMPhSp4SYU8WFNY2m47DbhaaOHqfyfSp0OgJ9GByDCvOiWesxGN8PpHpZe0rn Qh486LWZuZCoBI7EymsqXyE1xR5ucyPC2+Ny3RC8b+hozHE6ZEzGgko1f1wZ1Q7Z wIPphB2EHsZSn6KKUgQVB1RjGtXt0FOZuStJ39usQHBuB7CRNVhn67oxza6rgJs= =yyg9 -----END PGP SIGNATURE----- --mP3DRpeJDSE+ciuQ--