On 03/23/2010 04:06 PM, Joerg Roedel wrote:
On Mon, Mar 22, 2010 at 05:06:17PM -0500, Anthony Liguori wrote:
There always needs to be a system wide entity. There are two ways to
enumerate instances from that system wide entity. You can centralize
the creation of instances and there by maintain an list of current
instances. You can also allow instances to be created in a
decentralized manner and provide a standard mechanism for instances to
register themselves with the system wide entity.
And this system wide entity is the kvm module. It creates instances of
'struct kvm' and destroys them. I see no problem if we just attach a
name to every instance with a good default value like kvm0, kvm1 ... or
guest0, guest1 ... User-space can override the name if it wants. The kvm
module takes care about the names being unique.
So, two users can't have a guest named MyGuest each? What about
namespace support? There's a lot of work in virtualizing all kernel
namespaces, you're adding to that. What about notifications when guests
are added or removed?
This is very much the same as network card numbering is implemented in
the kernel.
Forcing perf to talk to qemu or even libvirt produces to much overhead
imho. Instrumentation only produces useful results with low overhead.
It's a setup cost only.
--
error compiling committee.c: too many arguments to function
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