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Date: Tue, 18 Oct 2011 15:58:44 +0800
From: Wen Congyang <wency@cn.fujitsu.com>
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Subject: Re: [Qemu-devel] [Question] dump memory when host pci device is
 used by guest
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To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: qemu-devel <qemu-devel@nongnu.org>, "Richard W.M. Jones" <rjones@redhat.com>, Luiz Capitulino <lcapitulino@redhat.com>

At 10/18/2011 03:52 PM, Jan Kiszka Write:
> On 2011-10-18 09:15, Wen Congyang wrote:
>> Hi, Jan Kiszka
>>
>> At 10/10/2011 05:34 PM, Jan Kiszka Write:
>>> On 2011-10-10 11:02, Daniel P. Berrange wrote:
>>>> On Mon, Oct 10, 2011 at 08:52:08AM +0200, Jan Kiszka wrote:
>>
>>>
>>> Run gdb with "set debug remote 1" and watch the communication, it is not
>>> that complex. But a dump command is probably simpler for those
>>> scenarios, I agree.
>>
>> I have implemented the command dump and reuse migration's code. But I meet a problem
>> when I test it.
> 
> Using migration code for dump is most probably the wrong approach as you
> saw through that conflict. All you need are the register states and the
> RAM. Reuse gdbstub services for this.

Hmm, if the migration code can not be reused, I think we should define a new
qemu's vmcore format, and add some codes into crash to support such format.

I will read gdbstub services's code now.

Thanks
Wen Congyang

> 
> Jan
>