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From: Wen Congyang <wency@cn.fujitsu.com>
To: Gonglei <arei.gonglei@huawei.com>,
	Li Zhijian <lizhijian@cn.fujitsu.com>,
	qemu-devel@nongnu.org, pbonzini@redhat.com, quintela@redhat.com,
	amit.shah@redhat.com
Subject: Re: [Qemu-devel] [PATCH 0/2] avoid a hotplug operation leading migration's source side abort
Date: Fri, 26 Jun 2015 16:36:35 +0800	[thread overview]
Message-ID: <558D0F13.30803@cn.fujitsu.com> (raw)
In-Reply-To: <558D072F.7030806@huawei.com>

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

> 
> 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
> 
> 
> 
> 

      reply	other threads:[~2015-06-26  8:33 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-26  7:21 [Qemu-devel] [PATCH 0/2] avoid a hotplug operation leading migration's source side abort Li Zhijian
2015-06-26  7:21 ` [Qemu-devel] [PATCH 1/2] migration: protect migration_bitmap Li Zhijian
2015-06-26  7:21 ` [Qemu-devel] [PATCH 2/2] migration: extend migration_bitmap Li Zhijian
2015-06-26  9:05   ` Juan Quintela
2015-06-26  9:15     ` Wen Congyang
2015-06-26  9:57       ` Igor Mammedov
2015-06-26  9:42     ` Li Zhijian
2015-06-26  8:02 ` [Qemu-devel] [PATCH 0/2] avoid a hotplug operation leading migration's source side abort Gonglei
2015-06-26  8:36   ` Wen Congyang [this message]

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