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Re: [Xen-devel] 4.7 qemu regression: HVM guests fail to boot from xvda



On 08/06/16 11:30, Ian Jackson wrote:
> George Dunlap writes ("Re: [Xen-devel] 4.7 qemu regression: HVM guests fail 
> to > We could consider at an xl level having a domain-wide and system-wide
>> defaults.  That way Olaf could set "disk_emulate_default=always" (or
>> whatever) in the global xl.conf and everything would work the way it
>> used to without even needing to change individual guest config files.
> 
> Yes.
> 
> Let me quote in email something I just said in irc:
> 
> 11:24 <Diziet> liuw: I think we need to decide what to do about Olaf's 
>                complaint about vdev semantic regression.
> 11:25 <Diziet> I know it's late in the release but given that the best answer 
>                is probably some per-vdev parameter to control the behaviour, 
>                along George's lines, and the reason we're not adopting that 
>                right away is compatibility pain: I'm tempted to suggest 
>                reverting the original change for 4.7.
> 11:26 <Diziet> The conversation in the thread about how to fix the problem is 
>                making progress but I am very uncomfortable with this amount 
> of 
>                detailed API design being done under release pressure.
> 11:27 <Diziet> Releases are about short-term thinking, which is harmful to 
> API 
>                design.

We definitely don't want to be putting this new stuff we're discussing
in 4.7.0.  I'd be OK with reverting the original change for the release.

 -George

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