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migration: Change zero_copy_send from migration parameter to migration capability

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When originally implemented, zero_copy_send was designed as a Migration
paramenter.

But taking into account how is that supposed to work, and how
the difference between a capability and a parameter, it only makes sense
that zero-copy-send would work better as a capability.

Taking into account how recently the change got merged, it was decided
that it's still time to make it right, and convert zero_copy_send into
a Migration capability.

Signed-off-by: Leonardo Bras <leobras@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  dgilbert: always define the capability, even on non-Linux but error if
set; avoids build problems with the capability
This commit is contained in:
Leonardo Bras
2022-06-20 02:39:45 -03:00
committed by Dr. David Alan Gilbert
parent 4f5a09714c
commit 1abaec9a1b
3 changed files with 34 additions and 63 deletions
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6
monitor/hmp-cmds.c
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@ -1311,12 +1311,6 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
p->has_multifd_zstd_level = true;
visit_type_uint8(v, param, &p->multifd_zstd_level, &err);
break;
#ifdef CONFIG_LINUX
case MIGRATION_PARAMETER_ZERO_COPY_SEND:
p->has_zero_copy_send = true;
visit_type_bool(v, param, &p->zero_copy_send, &err);
break;
#endif
case MIGRATION_PARAMETER_XBZRLE_CACHE_SIZE:
p->has_xbzrle_cache_size = true;
if (!visit_type_size(v, param, &cache_size, &err)) {