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Re: [libvirt] [PATCH] virConnectListAllDomains

On Fri, Aug 29, 2008 at 02:26:47PM +0100, Daniel P. Berrange wrote:
> The compatability code requires that you get all virDomainInfo objects
> to filter by state, but a native implementation in the various drivers
> will not neccessarily require this to be done.  I agree we should
> have the 'infos' parameter in the public API, it should be allowed
> to be NULL though.

OK, I'll change it so that infos can be NULL (but not domains).
Mainly this will involve changing the remote code.

> Fetching the info for QEMU guests is not entirely
> without costs of its own - read & parse several /proc/ files per
> VM, and filtering can be done without this, since QEMU tracks the state
> flag in libvirtd explicitly.

Yes, I missed the fact that qemuDomainGetInfo has to call out to get
process information.  I thought it just got everything from the vm

> I'd like to see an implementation of this working against XenD before
> we commit this to API, since that's the driver which stands to gain
> the most from the performance improvements this API ought to allow. 

OK, I don't have a way to test Xen right now.  I was hoping I could
implement it for QEMU first.



Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.

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