[PATCH v2 2/6] tests/qtests: remove migration test iterations config

["Daniel P. Berrangé" <berrange@redhat.com>]

The 'unsigned int interations' config for migration is somewhat
overkill. Most tests don't set it, and a value of '0' is treated
as equivalent to '1'. The only test that does set it, xbzrle,
used a value of '2'.

This setting, however, only relates to the migration iterations
that take place prior to allowing convergence. IOW, on top of
this iteration count, there is always at least 1 further migration
iteration done to deal with pages that are dirtied during the
previous iteration(s).

IOW, even with iterations==1, the xbzrle test will be running for
a minimum of 2 iterations. With this in mind we can simplify the
code and just get rid of the special case.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 tests/qtest/migration-test.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index ac2e8ecac6..e16120ff30 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -568,9 +568,6 @@ typedef struct {
         MIG_TEST_FAIL_DEST_QUIT_ERR,
     } result;
 
-    /* Optional: set number of migration passes to wait for */
-    unsigned int iterations;
-
     /* Postcopy specific fields */
     void *postcopy_data;
     bool postcopy_preempt;
@@ -1354,13 +1351,7 @@ static void test_precopy_common(MigrateCommon *args)
             qtest_set_expected_status(to, EXIT_FAILURE);
         }
     } else {
-        if (args->iterations) {
-            while (args->iterations--) {
-                wait_for_migration_pass(from);
-            }
-        } else {
-            wait_for_migration_pass(from);
-        }
+        wait_for_migration_pass(from);
 
         migrate_ensure_converge(from);
 
@@ -1514,8 +1505,6 @@ static void test_precopy_unix_xbzrle(void)
         .listen_uri = uri,
 
         .start_hook = test_migrate_xbzrle_start,
-
-        .iterations = 2,
     };
 
     test_precopy_common(&args);
-- 
2.40.0