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Re: [PATCH] x86/hvm: reserve another HVM context save record ID for Amazon





On 14/01/2022 07:08, Jan Beulich wrote:
On 07.01.2022 13:55, David Vrabel wrote:
Amazon's guest transparent live migration work needs another save
record (for event channel upcall vectors). Reserve another HVM context
save record ID for this.

I have to admit that I have reservations: I didn't really like seeing
the original range getting reserved. Even less so I'd like to see
extensions / further such reservations. The more that iirc the
original reservation was accepted based on a (perhaps vague) promise
of the respective uses actually getting upstreamed. Yet that hasn't
happened (nor even started to happen) in slightly over 2 years time,
iirc.

I think this is fair. I hadn't realized we'd sat on this work for so long.

What I could see as a compromise is to have, say, vendor ranges
higher up in number space.

I (personally) would accept removing the reservation entirely -- we didn't follow the upstreaming process, so we take the cost of fixing up any compatibility issues.

David



 


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