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Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel f
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram |
Date: |
Mon, 25 Nov 2013 10:48:29 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
Il 25/11/2013 08:29, Lei Li ha scritto:
>
>
> In this case, if the migration would fail just because the misconfiguration
> of device state on destination, in the meantime the outgoing migration has
> no aware of this failure, I think it should add such handling (like
> synchronize
> of the device state list in incoming side?) to the current migration protocol
> as it is kind of missing... It can not just rely on the resume of source
> guest for such failure... or maybe it should be handled in management
> app to force the configuration right?
It is already handled by libvirt, indeed.
Basically, "-incoming" without "-S" is a broken option because of the
missing handshake at the end of migration. With "-S" something else
(either a human or a program) can check that everything went well and
choose whether to restart the source or the destination.
>> Postcopy would fix this (assuming the postcopy phase is reliable) by
>> migrating device data before any page flipping occurs.
>
> Are you suggesting that page flipping should be coupled with the postcopy
> migration for live upgrade of QEMU as your comments in the previous
> version?
In order to make live upgrade reliable, it should.
Paolo
- Re: [Qemu-devel] [PATCH 16/17] migration: adjust migration_thread() process for page flipping, (continued)
[Qemu-devel] [PATCH 17/17] hmp: better format for info migrate_capabilities, Lei Li, 2013/11/21
Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Daniel P. Berrange, 2013/11/21
- Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Lei Li, 2013/11/22
- Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Paolo Bonzini, 2013/11/22
- Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Lei Li, 2013/11/25
- Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Lei Li, 2013/11/26
- Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Paolo Bonzini, 2013/11/26
- Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Andrea Arcangeli, 2013/11/27
Re: [Qemu-devel] [PATCH 0/17 v3] Localhost migration with side channel for ram, Daniel P. Berrange, 2013/11/22