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Date: Tue, 11 Oct 2011 15:13:37 +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@web.de>
Cc: Luiz Capitulino <lcapitulino@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, "Richard W.M. Jones" <rjones@redhat.com>

At 10/11/2011 02:58 PM, Jan Kiszka Write:
> On 2011-10-11 04:20, Wen Congyang wrote:
>>>>> The other reason why it would be good, is that we would then have a clearly
>>>>> defined standard "QEMU dump format", instead of "libvirt dump format for QEMU"
>>>>
>>>> A core file would be that format - for direct gdb processing. No
>>>> proprietary re-inventions please.
>>>
>>> I have no personal attachment to any particular format, so if the standard
>>> core file format is possible, then we should definitely try to use it in
>>> QEMU.
>>
>> I do not know whether there is such standard format. But IIRC, the format of kdump,
>> netdump, and diskdump is very similar.
>>
>> If we want to use such format in qemu, I think we can not do live dump in libvirt.
> 
> You said you wanted to perform crash dumps - so there hardly anything
> alive at this point.

The purpose of 'virsh dump' is for crash dumps, but we can not prevent the user doing
it when the kernel is alive.

Thanks
Wen Congyang

> 
> Jan
>