Re: [PATCH v3 2/7] migration/multifd: Implement zero page transmission on the multifd thread.

[Markus Armbruster]

Hao Xiang <hao.xiang@bytedance.com> writes:

> 1. Add zero_pages field in MultiFDPacket_t.
> 2. Implements the zero page detection and handling on the multifd
> threads for non-compression, zlib and zstd compression backends.
> 3. Added a new value 'multifd' in ZeroPageDetection enumeration.
> 4. Handle migration QEMU9.0 -> QEMU8.2 compatibility.
> 5. Adds zero page counters and updates multifd send/receive tracing
> format to track the newly added counters.
>
> Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>

[...]

> diff --git a/qapi/migration.json b/qapi/migration.json
> index 1e66272f8f..5a1bb8ad62 100644
> --- a/qapi/migration.json
> +++ b/qapi/migration.json
> @@ -660,10 +660,13 @@
>  #
>  # @legacy: Perform zero page checking from main migration thread.
>  #
> +# @multifd: Perform zero page checking from multifd sender thread.
> +#

Make that "in thread" instead of "from thread".  Both occurences,
i.e. here for @multifd, and in PATCH 1 for @legacy.

>  # Since: 9.0
> +#
>  ##
>  { 'enum': 'ZeroPageDetection',
> -  'data': [ 'none', 'legacy' ] }
> +  'data': [ 'none', 'legacy', 'multifd' ] }
>  
>  ##
>  # @BitmapMigrationBitmapAliasTransform: