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Re: [Qemu-devel] [PATCH v2 1/2] net: introduce MAC_TABLE_CHANGED event

From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH v2 1/2] net: introduce MAC_TABLE_CHANGED event
Date: Thu, 16 May 2013 08:58:38 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130402 Thunderbird/17.0.5

On 05/16/2013 06:17 AM, Michael S. Tsirkin wrote:
> On Thu, May 16, 2013 at 07:07:24PM +0800, Amos Kong wrote:
>> Introduce this new QMP event to notify management after guest changes
>> mac-table configuration.
> This makes it easy for guest to flood management with
> spurious events.
> How about we set a flag after this, and avoid sending any more
> events until management queries the filter status?

Or use rate-limiting, similar to what we have done for other
guest-triggered events (such as BALLOON_CHANGE), where management can
then tweak the maximum frequency at which it is willing to receive events.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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