Wen Congyang <ghost...@gmail.com> wrote:
> At 2015/7/7 21:09, Juan Quintela Wrote:
>> Make check fails with events. THis is due to the parser/lexer that it
>> uses. Just in case that they are more broken parsers, just only send
>> events when there are capabilities.
>>
>> Signed-off-by: Juan Quintela <quint...@redhat.com>
>> Reviewed-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
>> ---
>> include/migration/migration.h | 1 +
>> migration/migration.c | 20 ++++++++++++++++++--
>> qapi-schema.json | 5 ++++-
>> 3 files changed, 23 insertions(+), 3 deletions(-)
>>
>> diff --git a/include/migration/migration.h b/include/migration/migration.h
>> index a308ecc..b2711ef 100644
>> --- a/include/migration/migration.h
>> +++ b/include/migration/migration.h
>> @@ -177,6 +177,7 @@ bool migrate_use_compression(void);
>> int migrate_compress_level(void);
>> int migrate_compress_threads(void);
>> int migrate_decompress_threads(void);
>> +bool migrate_use_events(void);
>>
>> void ram_control_before_iterate(QEMUFile *f, uint64_t flags);
>> void ram_control_after_iterate(QEMUFile *f, uint64_t flags);
>> diff --git a/migration/migration.c b/migration/migration.c
>> index d8415c4..cd32eac 100644
>> --- a/migration/migration.c
>> +++ b/migration/migration.c
>> @@ -205,6 +205,14 @@ void register_global_state(void)
>> vmstate_register(NULL, 0, &vmstate_globalstate, &global_state);
>> }
>>
>> +static void migrate_generate_event(int new_state)
>> +{
>> + if (migrate_use_events()) {
>> + qapi_event_send_migration(new_state, &error_abort);
>> + trace_migrate_set_state(new_state);
>> + }
>> +}
>> +
>> /*
>> * Called on -incoming with a defer: uri.
>> * The migration can be started later after any parameters have been
>> @@ -511,8 +519,7 @@ void qmp_migrate_set_parameters(bool has_compress_level,
>> static void migrate_set_state(MigrationState *s, int old_state, int
>> new_state)
>> {
>> if (atomic_cmpxchg(&s->state, old_state, new_state) == old_state) {
>> - qapi_event_send_migration(new_state, &error_abort);
>> - trace_migrate_set_state(new_state);
>> + migrate_generate_event(new_state);
>
> Why moving trace_* to migrate_generate_event()? trace event should be
> controlled
> by the monitor command trace-event xxx on/off. It is very strange if the
> user turns
> the trace event on, but gets no output.
Ok, will send another patch with one line change.
I put the set_state event as migrate_event one, but can accept the other
meanining.
Thanks, Juan.
>
> Thanks
> Wen Congyang
>
>> }
>> }
>>
>> @@ -862,6 +869,15 @@ int migrate_decompress_threads(void)
>> return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
>> }
>>
>> +bool migrate_use_events(void)
>> +{
>> + MigrationState *s;
>> +
>> + s = migrate_get_current();
>> +
>> + return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS];
>> +}
>> +
>> int migrate_use_xbzrle(void)
>> {
>> MigrationState *s;
>> diff --git a/qapi-schema.json b/qapi-schema.json
>> index 106008c..1285b8c 100644
>> --- a/qapi-schema.json
>> +++ b/qapi-schema.json
>> @@ -523,6 +523,9 @@
>> # minimize migration traffic. The feature is disabled by default.
>> # (since 2.4 )
>> #
>> +# @events: generate events for each migration state change
>> +# (since 2.4 )
>> +#
>> # @auto-converge: If enabled, QEMU will automatically throttle down the
>> guest
>> # to speed up convergence of RAM migration. (since 1.6)
>> #
>> @@ -530,7 +533,7 @@
>> ##
>> { 'enum': 'MigrationCapability',
>> 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
>> - 'compress'] }
>> + 'compress', 'events'] }
>>
>> ##
>> # @MigrationCapabilityStatus
>>
