Re: [PATCH v2 for-4.15 3/7] CHANGELOG.md: Add dom0/domU zstd compression support

[Jan Beulich <jbeulich@xxxxxxxx>]

On 30.03.2021 12:14, Julien Grall wrote:
> 
> 
> On 30/03/2021 11:08, George Dunlap wrote:
>>
>>
>>> On Mar 29, 2021, at 7:54 PM, Julien Grall <julien.grall.oss@xxxxxxxxx> 
>>> wrote:
>>>
>>> Hi George,
>>>
>>> On Mon, 29 Mar 2021 at 17:15, George Dunlap <george.dunlap@xxxxxxxxxx> 
>>> wrote:
>>>> diff --git a/CHANGELOG.md b/CHANGELOG.md
>>>> index 8c89212f14..538eae611c 100644
>>>> --- a/CHANGELOG.md
>>>> +++ b/CHANGELOG.md
>>>> @@ -12,6 +12,7 @@ The format is based on [Keep a 
>>>> Changelog](https://keepachangelog.com/en/1.0.0/)
>>>>   - ARM SMMUv3 (Tech Preview)
>>>>   - Intel Processor Trace support (Tech Preview)
>>>>   - Named PCI devices for xl/libxl
>>>> + - Support for zstd-compressed dom0 and domU kernels
>>>
>>> Looking at the log, the feature looks x86 only (at least the dom0 part).
>>
>> Oh, interesting.  So what about the following?
>>
>> - Support for zstd-compressed dom0 (x86) and domU kernels
> 
> Sounds fine to me. Note that I haven't tried zstd-compressed for domu 
> Kernel on Arm.
> 
> Maybe the author (Jan) can confirm whether this was plumbed in common 
> libxc code?

Well, I've followed the model used for other compression methods. I have
no idea what this means or does not mean for Arm; in fact so far I was
under the impression that like in the hypervisor decompression support
was an x86-only feature, but from what you say I conclude I have been
wrong with this.

Jan