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From: Jes Sorensen <Jes.Sorensen@redhat.com>
To: Anthony Liguori <aliguori@linux.vnet.ibm.com>
Cc: agl@linux.vnet.ibm.com, stefanha@linux.vnet.ibm.com,
	markus_mueller@de.ibm.com, marcel.mittelstaedt@de.ibm.com,
	Michael Roth <mdroth@linux.vnet.ibm.com>,
	qemu-devel@nongnu.org, ryanh@us.ibm.com, abeekhof@redhat.com,
	Luiz Capitulino <lcapitulino@redhat.com>
Subject: Re: [Qemu-devel] [RFC][PATCH v6 00/23] virtagent: host/guest RPC communication agent
Date: Mon, 21 Feb 2011 09:32:31 +0100	[thread overview]
Message-ID: <4D62231F.9020901@redhat.com> (raw)
In-Reply-To: <4D5E88BD.3050006@linux.vnet.ibm.com>

On 02/18/11 15:57, Anthony Liguori wrote:
> On 02/18/2011 08:30 AM, Jes Sorensen wrote:
>> However if there's an agent connection, it could be arranged in a way
>> allowing the host to reconnect to the guest agent. In that way it really
>> shouldn't be a big deal as long as our agent commands aren't too complex.
> 
> Oh, but they'll be nice and complex :-)  What happens if you do a live
> migration in the middle of doing a live backup?  You'll end up with the
> guest waiting to be told that it's okay to unfreeze itself only to never
> be told.

Well that isn't really different from the current setup - if QEMU
migrates, the admin tool has to connect to the new QEMU process and
issue the fsthaw command there instead.

> Terminating in QEMU means we can do intelligent things like delay live
> migration convergence, save state, etc.

We could easily add a flag for this in QEMU itself, so I don't see it
being a big issue.

Jes

  reply	other threads:[~2011-02-21  8:32 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-17 13:14 [Qemu-devel] [RFC][PATCH v6 00/23] virtagent: host/guest RPC communication agent Michael Roth
2011-01-17 13:14 ` [Qemu-devel] [RFC][PATCH v6 01/23] Move code related to fd handlers into utility functions Michael Roth
2011-01-17 13:56   ` Gerd Hoffmann
2011-01-17 13:14 ` [Qemu-devel] [RFC][PATCH v6 02/23] Add qemu_set_fd_handler() wrappers to qemu-tools.c Michael Roth
2011-01-17 13:14 ` [Qemu-devel] [RFC][PATCH v6 03/23] Make qemu timers available for tools Michael Roth
2011-01-21 16:30   ` [Qemu-devel] " Jes Sorensen
2011-01-21 17:26     ` Michael Roth
2011-01-24  7:56       ` Jes Sorensen
2011-01-17 13:14 ` [Qemu-devel] [RFC][PATCH v6 04/23] virtagent: common code for managing client/server rpc jobs Michael Roth
2011-01-17 13:14 ` [Qemu-devel] [RFC][PATCH v6 05/23] virtagent: transport definitions read/send callback functions Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 06/23] virtagent: base client definitions Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 07/23] virtagent: base server definitions Michael Roth
2011-01-21 16:38   ` [Qemu-devel] " Jes Sorensen
2011-01-21 17:55     ` Michael Roth
2011-01-24 10:16       ` Jes Sorensen
2011-01-24 16:51         ` Michael Roth
2011-01-24 17:04           ` Jes Sorensen
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC Michael Roth
2011-01-21 16:40   ` [Qemu-devel] " Jes Sorensen
2011-01-21 17:20     ` Daniel P. Berrange
2011-01-21 18:23       ` Michael Roth
2011-01-24 22:08         ` Richard W.M. Jones
2011-01-24 22:20           ` Richard W.M. Jones
2011-01-24 22:26             ` Anthony Liguori
2011-01-24 22:48               ` Richard W.M. Jones
2011-01-24 23:40                 ` Anthony Liguori
2011-01-25  0:22                   ` Michael Roth
2011-01-25  0:25                     ` Anthony Liguori
2011-01-25  9:21                   ` Richard W.M. Jones
2011-01-25 15:12                     ` Anthony Liguori
2011-01-25 15:43                       ` Richard W.M. Jones
2011-01-26 13:01                         ` Richard W.M. Jones
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 09/23] virtagent: add agent_viewfile qmp/hmp command Michael Roth
2011-01-21 16:41   ` [Qemu-devel] " Jes Sorensen
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 10/23] virtagent: add va.getdmesg RPC Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 11/23] virtagent: add agent_viewdmesg qmp/hmp commands Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 12/23] virtagent: add va.shutdown RPC Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 13/23] virtagent: add agent_shutdown qmp/hmp commands Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 14/23] virtagent: add va.ping RPC Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 15/23] virtagent: add agent_ping qmp/hmp commands Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 16/23] virtagent: add agent_capabilities " Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 17/23] virtagent: add client capabilities init function Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 18/23] virtagent: add va.hello RPC Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 19/23] virtagent: add "hello" notification function for guest agent Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 20/23] virtagent: add va.capabilities RPC Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 21/23] virtagent: add virtagent guest daemon Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 22/23] virtagent: integrate virtagent server/client via chardev Michael Roth
2011-01-17 13:15 ` [Qemu-devel] [RFC][PATCH v6 23/23] virtagent: various bits to build QEMU with virtagent Michael Roth
2011-01-24 10:24   ` [Qemu-devel] " Jes Sorensen
2011-01-17 13:53 ` [Qemu-devel] [RFC][PATCH v6 00/23] virtagent: host/guest RPC communication agent Gerd Hoffmann
2011-01-17 14:53   ` Michael Roth
2011-01-18 14:02     ` Gerd Hoffmann
2011-01-18 14:13       ` Anthony Liguori
2011-01-31 14:41         ` Michael Roth
2011-02-01 22:18           ` Michael Roth
2011-02-14  9:49             ` Gerd Hoffmann
2011-02-16 16:04 ` Jes Sorensen
2011-02-16 17:22   ` Michael Roth
2011-02-17  8:26     ` Jes Sorensen
2011-02-17  9:08       ` Dor Laor
2011-02-17 14:39       ` Michael Roth
2011-02-18 12:45         ` Jes Sorensen
2011-02-18 14:07           ` Anthony Liguori
2011-02-18 14:30             ` Jes Sorensen
2011-02-18 14:57               ` Anthony Liguori
2011-02-21  8:32                 ` Jes Sorensen [this message]
2011-02-21 13:36                   ` Michael Roth
2011-02-21 13:38                     ` Jes Sorensen
2011-02-18 15:22             ` Gerd Hoffmann
2011-02-18 15:25               ` Anthony Liguori

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