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migration/postcopy: start_postcopy could be true only when migrate_postcopy() return true 

There is only one place to set start_postcopy to true,
qmp_migrate_start_postcopy(), which make sure start_postcopy could be
set to true when migrate_postcopy() return true.

So start_postcopy is true implies the other one.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Message-Id: <20190718083747.5859-1-richardw.yang@linux.intel.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Wei Yang 2019-07-18 16:37:47 +08:00 committed by Dr. David Alan Gilbert
parent 305b6f8431
commit 52aec70923
1 changed files with 1 additions and 2 deletions
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3
migration/migration.c
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@ -3103,8 +3103,7 @@ static MigIterateState migration_iteration_run(MigrationState *s)
if (pending_size && pending_size >= s->threshold_size) {
/* Still a significant amount to transfer */
if (migrate_postcopy() && !in_postcopy &&
pend_pre <= s->threshold_size &&
if (!in_postcopy && pend_pre <= s->threshold_size &&
atomic_read(&s->start_postcopy)) {
if (postcopy_start(s)) {
error_report("%s: postcopy failed to start", __func__);