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Re: [Qemu-devel] [RFC][PATCH 10/16 v6] run dump at the background


From: Jan Kiszka
Subject: Re: [Qemu-devel] [RFC][PATCH 10/16 v6] run dump at the background
Date: Tue, 14 Feb 2012 19:27:34 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666

On 2012-02-14 19:05, Jan Kiszka wrote:
> On 2012-02-09 04:28, Wen Congyang wrote:
>> The new monitor command dump may take long time to finish. So we need run it
>> at the background.
> 
> How does it work? Like live migration, i.e. you retransmit (overwrite)
> already written but then dirtied pages? Hmm... no.
> 
> What does background mean then? What is the use case? What if the user
> decides to resume the vm?

OK, that is addressed in patch 15! I would suggest merging it into this
patch. It makes sense to handle that case gracefully right from the
beginning.

OK, now I have some other question: What is the point of rate-limiting
the dump? The guest is not running, thus not competing for bandwidth.

Jan

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Corporate Competence Center Embedded Linux



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