Re: [Qemu-devel] [help]: how to use HMP command dump-guest-memory

[HATAYAMA Daisuke]

From: Wen Congyang <address@hidden>
Subject: Re: [Qemu-devel] [help]: how to use HMP command dump-guest-memory
Date: Thu, 19 Jul 2012 15:41:22 +0800

> At 07/19/2012 03:29 PM, Sheldon Wrote:

> kernel coredump? Do you mean kdump?
> 
> They are almost the same. The core generated by dump-guest-memory
> contains some registers' value which is not included in the core
> generated by kdump.
> 
> The kdump runs in the guest, while dump-guest-memory runs in
> the host. If you forget to start kdump, you can use dump-guest-memory
> to get the core.
> 

The point is the fact that external crash dump mechanism doesn't touch
guest memory, so it can run safely even if kdump on the guest failed
for example due to lost of its logical integrity caused by broken
memory.

Thanks.
HATAYAMA, Daisuke