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Re: [Qemu-devel] [PATCH 3/8] migration: add new capability test-only
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH 3/8] migration: add new capability test-only |
Date: |
Wed, 7 Oct 2015 09:05:08 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 10/07/2015 12:20 AM, Denis V. Lunev wrote:
> From: Igor Redko <address@hidden>
>
> This patch declares a new migration capability that allows
> to distinguish between true migration and the test.
>
> An alternative is using a custom URI but in this case the
> following problems should be solved:
> 1/ QEMUFile abstraction hides the real transport type
> 2/ We must be ensured that VM will not be stopped due to
> “successful migration”
>
> Possible solutions:
> 1/ Using global variable analogous to
> s->enabled_capabilities[MIGRATION_CAPABILITY_TEST_ONLY] that
> will be initialized according to the migration type at the
> beginning of the migration process
> 2/ Additional hook, presence of implementation of which allows
> to decide whether the migration is true
>
Do we want to name the capability 'x-test-only', since this series is
experimental, to make it obvious that production code should not rely on it?
> +++ b/qapi-schema.json
> @@ -540,11 +540,14 @@
> # @auto-converge: If enabled, QEMU will automatically throttle down the guest
> # to speed up convergence of RAM migration. (since 1.6)
> #
> +# @test-only: If enabled, QEMU instead of migrating will estimate migration
> +# time basing on given downtime and current dirty page rate
If we do decide to add this to mainline, it would need 'since 2.5' (or
whatever version) documentation.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] Debugging Migration, John Snow, 2015/10/08
- Re: [Qemu-devel] Debugging Migration, Dr. David Alan Gilbert, 2015/10/08
- Re: [Qemu-devel] Debugging Migration, Denis V. Lunev, 2015/10/08
- Re: [Qemu-devel] Debugging Migration, John Snow, 2015/10/08
- Re: [Qemu-devel] Debugging Migration, Denis V. Lunev, 2015/10/08
- [Qemu-devel] [RFC 0/8] QEMUFile-way to gather VM's memory statistics, Denis V. Lunev, 2015/10/08
- [Qemu-devel] [PATCH 3/8] migration: add new capability test-only, Denis V. Lunev, 2015/10/08
- Re: [Qemu-devel] [PATCH 3/8] migration: add new capability test-only,
Eric Blake <=
- Re: [Qemu-devel] [PATCH 3/8] migration: add new capability test-only, Denis V. Lunev, 2015/10/09
- Re: [Qemu-devel] [PATCH 3/8] migration: add new capability test-only, Dr. David Alan Gilbert, 2015/10/09
- [Qemu-devel] [PATCH 7/8] migration: new migration test mode, Denis V. Lunev, 2015/10/08
- Re: [Qemu-devel] [PATCH 7/8] migration: new migration test mode, Dr. David Alan Gilbert, 2015/10/08
- Re: [Qemu-devel] [PATCH 7/8] migration: new migration test mode, Eric Blake, 2015/10/08
- Re: [Qemu-devel] [PATCH 7/8] migration: new migration test mode, Denis V. Lunev, 2015/10/09
- Re: [Qemu-devel] [PATCH 7/8] migration: new migration test mode, Dr. David Alan Gilbert, 2015/10/08
- Re: [Qemu-devel] [PATCH 7/8] migration: new migration test mode, Denis V. Lunev, 2015/10/09
- Re: [Qemu-devel] [PATCH 7/8] migration: new migration test mode, Dr. David Alan Gilbert, 2015/10/08
- [Qemu-devel] [PATCH 4/8] migration: add function for reseting migration bitmap, Denis V. Lunev, 2015/10/08