Re: [Qemu-devel] QEMU patch to allow VM introspection via libvmi

[Eduardo Habkost]

On Wed, Oct 21, 2015 at 12:54:23PM +0200, Markus Armbruster wrote:
> Valerio Aimale <address@hidden> writes:
[...]
> > There's also a similar patch, floating around the internet, the uses
> > shared memory, instead of sockets, as inter-process communication
> > between libvmi and QEMU. I've never used that.
> 
> By the time you built a working IPC mechanism on top of shared memory,
> you're often no better off than with AF_LOCAL sockets.
> 
> Crazy idea: can we allocate guest memory in a way that support sharing
> it with another process?  Eduardo, can -mem-path do such wild things?

It can't today, but just because it creates a temporary file inside
mem-path and unlinks it immediately after opening a file descriptor. We
could make memory-backend-file also accept a full filename as argument,
or add a mechanism to let QEMU send the open file descriptor to a QMP
client.

-- 
Eduardo