From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37039) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WW76K-00085e-5A for qemu-devel@nongnu.org; Fri, 04 Apr 2014 12:36:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WW76E-0006XS-Ts for qemu-devel@nongnu.org; Fri, 04 Apr 2014 12:36:20 -0400 Received: from mx1.redhat.com ([209.132.183.28]:27188) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WW76E-0006Wz-M3 for qemu-devel@nongnu.org; Fri, 04 Apr 2014 12:36:14 -0400 Message-ID: <533EDF66.10302@redhat.com> Date: Fri, 04 Apr 2014 10:35:50 -0600 From: Eric Blake MIME-Version: 1.0 References: <1392713429-18201-1-git-send-email-mrhines@linux.vnet.ibm.com> <1392713429-18201-11-git-send-email-mrhines@linux.vnet.ibm.com> <531F84FD.7010608@redhat.com> <87mwgwz8ja.fsf@elfo.mitica> <531F9300.50304@redhat.com> <533E4331.2020202@linux.vnet.ibm.com> <20140404162829.GA6393@work-vm> In-Reply-To: <20140404162829.GA6393@work-vm> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="SoElSkUNSpTg5Q2gsieg1fnrLoqFwCStP" Subject: Re: [Qemu-devel] [RFC PATCH v2 10/12] mc: expose tunable parameter for checkpointing frequency List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Dr. David Alan Gilbert" , "Michael R. Hines" Cc: GILR@il.ibm.com, SADEKJ@il.ibm.com, quintela@redhat.com, hinesmr@cn.ibm.com, qemu-devel@nongnu.org, EREZH@il.ibm.com, Luiz Capitulino , owasserm@redhat.com, junqing.wang@cs2c.com.cn, onom@us.ibm.com, abali@us.ibm.com, lig.fnst@cn.fujitsu.com, gokul@us.ibm.com, dbulkow@gmail.com, pbonzini@redhat.com, BIRAN@il.ibm.com, isaku.yamahata@gmail.com, "Michael R. Hines" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --SoElSkUNSpTg5Q2gsieg1fnrLoqFwCStP Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 04/04/2014 10:28 AM, Dr. David Alan Gilbert wrote: > One thing to be a little careful about if we merge these tunables > together, is what tunables are allowed to be changed while the migratio= n > is running. The 'capabilities' are currently fixed once the migration > starts, but I know at least some of the tuneables people want to change= > while things are going - and some care is needed with it since (as we > found with the xbzrle cache size) we get fun due to the use being in > a different thread. Possible to solve that by adding an annotation in extended query output of which tunables are live, and by making the set command reject any changes for a tunable that is not live if migration is already underway. But yes, worth thinking about. --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --SoElSkUNSpTg5Q2gsieg1fnrLoqFwCStP Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJTPt9mAAoJEKeha0olJ0Nq8gIH/1HQa/Qmtw7yU5jCt+tH4za9 tzzvVE4T5VwhO0JEuJQQHTvqeMMSASNe9QYpc2inOR6sLpbw/JPVKeUP+ctDBMDf 1l/oCyECvPKm1G56cGQdrv8dYPx/+5rmp4CEwMLyb+ek/xe85rJVg2PccWMzbnPO H1Hy5mfwslqdTTGZF9xqZj4sGZEz0hiMrA2KL8M8lr+js8MJcSDFVU48wD/Msc0P rBe+5CmMrcJ5ZjQ2cqMbsnx0iNmE7YArwtjmWR/Z+uDL1gUKkDqbC7pFADVf9TF8 89LuYPf/7bYkSaUdhDmS5qXJcrdITfJWINEHftGT7AcOihH1OPIl6nuPxKj0UGA= =QpJw -----END PGP SIGNATURE----- --SoElSkUNSpTg5Q2gsieg1fnrLoqFwCStP--