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Re: [PATCH] migration/postcopy: Recognise the recovery states as 'in_pos


From: Peter Xu
Subject: Re: [PATCH] migration/postcopy: Recognise the recovery states as 'in_postcopy'
Date: Tue, 24 Sep 2019 08:15:20 +0800
User-agent: Mutt/1.11.4 (2019-03-13)

On Mon, Sep 23, 2019 at 06:49:42PM +0100, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <address@hidden>
> 
> Various parts of the migration code do different things when they're
> in postcopy mode; prior to this patch this has been 'postcopy-active'.
> This patch extends 'in_postcopy' to include 'postcopy-paused' and
> 'postcopy-recover'.
> 
> In particular, when you set the max-postcopy-bandwidth parameter, this
> only affects the current migration fd if we're 'in_postcopy';
> this leads to a race in the postcopy recovery test where it increases
> the speed from 4k/sec to unlimited, but that increase can get ignored
> if the change is made between the point at which the reconnection
> happens and it transitions back to active.
> 
> Signed-off-by: Dr. David Alan Gilbert <address@hidden>

Yeh this makes quite a lot of sense to me...

Reviewed-by: Peter Xu <address@hidden>

-- 
Peter Xu



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