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Re: [Qemu-devel] [PATCH 0/2] avoid a hotplug operation leading migration
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From: |
Wen Congyang |
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Subject: |
Re: [Qemu-devel] [PATCH 0/2] avoid a hotplug operation leading migration's source side abort |
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Date: |
Fri, 26 Jun 2015 16:36:35 +0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 06/26/2015 04:02 PM, Gonglei wrote:
> On 2015/6/26 15:21, Li Zhijian wrote:
>> qemu migration's source side will exit unexpectedly when we hotplug a deivce
>> during a migration is processing.
>
> Can we simply disable hot-plugging functions during migration process?
1. there is no API to disable it, and it is not a simple work.
2. For HA/FT, we will use migration to implement checkpoint. We should
enable hot-plug when HA/FT is running. There are too many works to do
to make it work. The first step is to fix the problem.
Thanks
Wen Congyang
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> Regards,
> -Gonglei
>
>> we can reproduced it easily by following step
>> 1. do something with dirty memory requently(like memtester) in guest
>> 2. startup a background migraion with '-d' option
>> 3. hotplug a device(device_add e1000,id=mye1000)
>> 4. stop step.1, let guest idle so that migration can complete fastly
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