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Re: [Qemu-discuss] Ram dump more than 4GB

From: Thomas Huth
Subject: Re: [Qemu-discuss] Ram dump more than 4GB
Date: Mon, 24 Jul 2017 11:06:04 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0

On 21.07.2017 19:46, Pierre Kim wrote:
> Hello, I am looking for a way to dump the RAM of a virtual machine.
> There is pmemsave but it only allows 32bit integers as the parameter so
> I am unable to dump RAM areas past 4GB limit.
> Is there a way to dump RAM regions after 4GB.

I guess it should be possible to fix the HMP command to allow sizes to
be specified with 64-bit...
But until that is done: It seems like only the size parameter is limited
to 32-bit, but the address can be given as full 64-bit instead. So you
could call it multiple times with different address parameters and then
concatenate the files.

Or have a look at the QMP version of that command instead (see the Wiki
at http://wiki.qemu.org/QMP for how to use that). I think its size
parameter is not limited to 32-bit.


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