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

[Wen Congyang <wency@cn.fujitsu.com>]

At 10/10/2011 05:34 PM, Jan Kiszka Write:
> On 2011-10-10 11:02, Daniel P. Berrange wrote:

> Run gdb with "set debug remote 1" and watch the communication, it is not
> that complex. But a dump command is probably simpler for those
> scenarios, I agree.

We have determined to introduce a new command dump for such scenarios.
Now, let's to discuss the arguments for this command:

Here is the arguments for command migrate:
    {    
        .name       = "migrate",
        .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
        .params     = "[-d] [-b] [-i] uri",
...
    },   

I think the arguments -b and -i are not required for dump, and -d is useful
for dump.

We can pass the file's path or fd to qemu instead of uri.

So here is my image for command dump(reuse migration's code, not generate a standard
format core):
    {
        .name       = "dump",
        .args_type  = "detach:-d,file:s",
        .params     = "[-d] file",
...
    },

The argument can be 'file:file's path' or 'fd:fd's name'

Any advice is welcome.

Thanks
Wen Congyang
> 
> Jan
>