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Re: [Qemu-devel] Re: virtio: Add memory statistics reporting to the ball

From: Avi Kivity
Subject: Re: [Qemu-devel] Re: virtio: Add memory statistics reporting to the balloon driver
Date: Wed, 11 Nov 2009 17:00:02 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20090922 Fedora/3.0-3.9.b4.fc12 Thunderbird/3.0b4

On 11/11/2009 03:26 PM, Adam Litke wrote:
On Wed, 2009-11-11 at 10:12 +0000, Daniel P. Berrange wrote:
This all suggests that we should only update the stats from the guest
when something on the host actually asks for them by issuing the QEMU
monitor command. We don't want any kind of continuous polling of stats
at any frequency, if nothing is using these stats on the host.
Agreed.  The next version of the patch will remove the timer completely.
We'll wake up in response to config change notifications only.

A vq with its own interrupt would be much nicer.

Do not meddle in the internals of kernels, for they are subtle and quick to 

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