From: Eric Blake <eblake@redhat.com>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"Michael R. Hines" <mrhines@linux.vnet.ibm.com>
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 <lcapitulino@redhat.com>,
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" <mrhines@us.ibm.com>
Subject: Re: [Qemu-devel] [RFC PATCH v2 10/12] mc: expose tunable parameter for checkpointing frequency
Date: Fri, 04 Apr 2014 10:35:50 -0600 [thread overview]
Message-ID: <533EDF66.10302@redhat.com> (raw)
In-Reply-To: <20140404162829.GA6393@work-vm>
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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 migration
> 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.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2014-04-04 16:36 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-18 8:50 [Qemu-devel] [RFC PATCH v2 00/12] mc: fault tolerante through micro-checkpointing mrhines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 01/12] mc: add documentation for micro-checkpointing mrhines
2014-02-18 12:45 ` Dr. David Alan Gilbert
2014-02-19 1:40 ` Michael R. Hines
2014-02-19 11:27 ` Dr. David Alan Gilbert
2014-02-20 1:17 ` Michael R. Hines
2014-02-20 10:09 ` Dr. David Alan Gilbert
2014-02-20 11:14 ` Li Guang
2014-02-20 14:58 ` Michael R. Hines
2014-02-20 14:57 ` Michael R. Hines
2014-02-20 16:32 ` Dr. David Alan Gilbert
2014-02-21 4:54 ` Michael R. Hines
2014-02-21 9:44 ` Dr. David Alan Gilbert
2014-03-03 6:08 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 02/12] mc: timestamp migration_bitmap and KVM logdirty usage mrhines
2014-02-18 10:32 ` Dr. David Alan Gilbert
2014-02-19 1:42 ` Michael R. Hines
2014-03-11 21:31 ` Juan Quintela
2014-04-04 3:08 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 03/12] mc: introduce a 'checkpointing' status check into the VCPU states mrhines
2014-03-11 21:36 ` Juan Quintela
2014-04-04 3:11 ` Michael R. Hines
2014-03-11 21:40 ` Eric Blake
2014-04-04 3:12 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 04/12] mc: support custom page loading and copying mrhines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 05/12] rdma: accelerated memcpy() support and better external RDMA user interfaces mrhines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 06/12] mc: introduce state machine changes for MC mrhines
2014-02-19 1:00 ` Li Guang
2014-02-19 2:14 ` Michael R. Hines
2014-02-20 5:03 ` Michael R. Hines
2014-02-21 8:13 ` Michael R. Hines
2014-02-24 6:48 ` Li Guang
2014-02-26 2:52 ` Li Guang
2014-03-11 21:57 ` Juan Quintela
2014-04-04 3:50 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 07/12] mc: introduce additional QMP statistics for micro-checkpointing mrhines
2014-03-11 21:45 ` Eric Blake
2014-04-04 3:15 ` Michael R. Hines
2014-04-04 4:22 ` Eric Blake
2014-03-11 21:59 ` Juan Quintela
2014-04-04 3:55 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 08/12] mc: core logic mrhines
2014-02-19 1:07 ` Li Guang
2014-02-19 2:16 ` Michael R. Hines
2014-02-19 2:53 ` Li Guang
2014-02-19 4:27 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 09/12] mc: configure and makefile support mrhines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 10/12] mc: expose tunable parameter for checkpointing frequency mrhines
2014-03-11 21:49 ` Eric Blake
2014-03-11 22:15 ` Juan Quintela
2014-03-11 22:49 ` Eric Blake
2014-04-04 5:29 ` Michael R. Hines
2014-04-04 14:56 ` Eric Blake
2014-04-11 6:10 ` Michael R. Hines
2014-04-04 16:28 ` Dr. David Alan Gilbert
2014-04-04 16:35 ` Eric Blake [this message]
2014-04-04 3:29 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 11/12] mc: introduce new capabilities to control micro-checkpointing mrhines
2014-03-11 21:57 ` Eric Blake
2014-04-04 3:38 ` Michael R. Hines
2014-04-04 4:25 ` Eric Blake
2014-03-11 22:02 ` Juan Quintela
2014-03-11 22:07 ` Eric Blake
2014-04-04 3:57 ` Michael R. Hines
2014-04-04 3:56 ` Michael R. Hines
2014-02-18 8:50 ` [Qemu-devel] [RFC PATCH v2 12/12] mc: activate and use MC if requested mrhines
2014-02-18 9:28 ` [Qemu-devel] [RFC PATCH v2 00/12] mc: fault tolerante through micro-checkpointing Li Guang
2014-02-19 1:29 ` Michael R. Hines
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