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From: | Anthony Liguori |
Subject: | [Qemu-devel] Re: Live migration broken when under heavy IO |
Date: | Tue, 16 Jun 2009 07:50:12 -0500 |
User-agent: | Thunderbird 2.0.0.21 (X11/20090320) |
Avi Kivity wrote:
Does anyone have a clever idea how to fix this without just waiting for all IO requests to complete?What's wrong with waiting for requests to complete? It should take a few tens of milliseconds.
An alternative would be to attempt to cancel the requests. This incurs no non-deterministic latency.
The tricky bit is that this has to happen at the device layer because the opaques cannot be saved in a meaningful way.
We could start throttling requests late in the live stage, but I don't really see the point.Isn't virtio migration currently broken due to the qdev changes?
-- Regards, Anthony Liguori
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