Re: [PATCH V4 14/14] migration: options incompatible with cpr

[Markus Armbruster <armbru@redhat.com>]

Steven Sistare <steven.sistare@oracle.com> writes:

> On 2/28/2024 2:21 AM, Markus Armbruster wrote:
>> Steve Sistare <steven.sistare@oracle.com> writes:
>> 
>>> Fail the migration request if options are set that are incompatible
>>> with cpr.
>>>
>>> Signed-off-by: Steve Sistare <steven.sistare@oracle.com>

[...]

>>> diff --git a/qapi/migration.json b/qapi/migration.json
>>> index 0990297..c6bfe2e 100644
>>> --- a/qapi/migration.json
>>> +++ b/qapi/migration.json
>>> @@ -657,6 +657,8 @@
>>>  #     shared backend must be be non-volatile across reboot, such as by backing
>>>  #     it with a dax device.
>>>  #
>>> +#     cpr-reboot may not be used with postcopy, colo, or background-snapshot.
>>> +#
>> 
>> @cpr-reboot
>> 
>> COLO
>> 
>> Wrap the line:
>> 
>>    #     @cpr-reboot may not be used with postcopy, COLO, or
>>    #     background-snapshot.
>> 
>> This doesn't tell the reader what settings exactly do not work with
>> @cpr-reboot.
>> 
>> For instance "background-snapshot" is about enabling migration
>> capability @background-snapshot.  We could write something like "is
>> incompatible with enabling migration capability @background-snapshot".
>> 
>> Same for the other two.  Worthwhile?
>
> I initially was more precise exactly as you suggest, but I realized that
> postcopy encompasses multiple capabilities, and I did not want to enumerate
> them, nor require new capabilities related to these 3 to be listed here 
> if/when they are created, so I generalized.  A keyword search in this file 
> gives unambiguous matches.
>
> Peter pushed the patch a few hours before you sent this.

Okay.

A followup patch to correct @cpr-reboot, COLO and line wrapping would be
nice.