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Date: Thu, 25 Dec 2014 17:19:36 +0800
From: Bin Wu <wu.wubin@huawei.com>
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Subject: Re: [Qemu-devel] [question] block: do we have any consideration
 about adding retry support in error handling?
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To: Fam Zheng <famz@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, "pbonzini@redhat.com >> Paolo Bonzini" <pbonzini@redhat.com>, qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>

On 2014/12/25 15:19, Fam Zheng wrote:
> On Thu, 12/25 11:46, Bin Wu wrote:
>> On 2014/12/25 10:42, Fam Zheng wrote:
>>> On Thu, 12/25 09:57, Bin Wu wrote:
>>>> Hi,
>>>>
>>>> When IO error happens in physical device, qemu block layer supports error
>>>> reporting, error ignoring and error stoping(for example, virtio-blk). Can we
>>>> have any way to resend the error IO?
>>>
>>> With error stop, the request is retried after resume.
>>>
>>> Fam
>>>
>>>
>>
>> Thank you very much, Fam, I see. Another question: I think error stop is not the
>> default error handling strategy, how can we configure error stop in the VM XML
>> file? Can you just show me some example? Thanks again:>
> 
> This is a question for libvirt, look for "error_policy":
> 
> https://libvirt.org/formatdomain.html
> 
> Fam
> 
> 

yes,
...
<driver name='qemu' type='qcow2' cache='none' error_policy='stop' io='native'/>
...

-- 
Bin Wu