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Re: [Qemu-devel] [Question] dump memory when host pci device is used by
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From: |
Jan Kiszka |
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Subject: |
Re: [Qemu-devel] [Question] dump memory when host pci device is used by guest |
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Date: |
Fri, 07 Oct 2011 12:16:07 +0200 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-10-07 11:46, Wen Congyang wrote:
> Currently, virsh dump uses monitor command migrate to dump guest's memory
> to file, and we can use crash to analyze the file.
>
> Unfortunately, virsh dump can not work if guest uses host pci device. The
> reason is that the device's status is also needed to migrate to remote
> machine,
> and the host pci device's status is not stored in qemu. So it is unmigratable.
>
> I think we can we can add a option to qmp command migrate(eg: skip) to allow
> the user to skip the check, and this option should be used only when dumping
> the guest's memory.
Why not simply attach gdb? That works independently of migration.
Jan
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