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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] [CFR 1/10] qmp: balloon command |
Date: | Tue, 15 Jun 2010 11:42:58 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100423 Lightning/1.0b1 Thunderbird/3.0.4 |
On 06/15/2010 11:30 AM, Anthony Liguori wrote:
balloon ------- Request VM to change its memory allocation (in bytes).
We ought to clarify a few points: 1) What happens if there isn't a balloon device? 2) What happens upon reboot? 3) What is the valid range for value?4) How does a user determine when the guest has actually responded to the balloon request?
This is a case where I think we ought to use async events because the guest can adjust it's balloon allotment without an explicit request from the host. In fact, if we add a shrinker callback to the balloon driver (and we should) it will do exactly this.
Regards, Anthony Liguori
Arguments: - "value": New memory allocation (json-int) Example: -> { "execute": "balloon", "arguments": { "value": 536870912 } } <- { "return": {} }
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