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Re: [Qemu-devel] [RFC PATCH RDMA support v1: 10/13] introduce new comman

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [RFC PATCH RDMA support v1: 10/13] introduce new command migrate_check_for_zero
Date: Thu, 11 Apr 2013 17:45:36 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4

Il 11/04/2013 17:35, Michael R. Hines ha scritto:
> Nevertheless, the initial "burst" of the bulk phase round is still 
> important to optimize, and I would like to know if the maintainer
> would accept this API for disabling the scan or not

I'm not a maintainer, but every opinion counts... and my opinion is "not
yet".  Maybe for 1.6, and only after someone else tried it out.  That's
why it's important to merge the code early.

> We think it's important because the total migration time can be much
> smaller with high-throughput RDMA links by optimizing the bulk-phase
> round and that lower total migration time is very valuable to many of
> our workloads, in addition to the low-downtime benefits you get with 
> I have expensive numbers only for the bulk phase round. Other than that,
> I would be breaking confidentiality outside of the paper we have already
> published.

Fair enough.


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