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Re: [Qemu-devel] [Question] dump memory when host pci device is used by


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [Question] dump memory when host pci device is used by guest
Date: Mon, 10 Oct 2011 13:09:17 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0.2) Gecko/20110906 Thunderbird/6.0.2

On 10/10/2011 01:04 PM, Daniel P. Berrange wrote:
On Mon, Oct 10, 2011 at 12:48:52PM +0200, Paolo Bonzini wrote:
>  On 10/10/2011 12:21 PM, Alon Levy wrote:
>  >>    A core file would be that format - for direct gdb processing. No
>  >>    proprietary re-inventions please.
>  >
>  >Just a note: A core file to windows core dump file would be nice for
>  >windows guest crashes.
>
>  That requires cooperation from a kernel driver in the Windows guest.
>  The driver must call KeInitializeCrashDumpHeader and write somewhere
>  the physical address of the buffer.
That won't be suitable for 'virsh dump' then, because we need this to
work when the guest OS is in a crashed/non-responsive state, and so
we cna't rely on talking to it.

Note that the guest can generate the buffer before it crashes.

Paolo



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