[PATCH v4 5/7] migration/multifd: Add new migration test cases for legacy zero page checking.

From: Hao Xiang <hao.xiang@bytedance.com>
To: pbonzini@redhat.com, berrange@redhat.com, eduardo@habkost.net,
	peterx@redhat.com, farosas@suse.de, eblake@redhat.com,
	armbru@redhat.com, thuth@redhat.com, lvivier@redhat.com,
	jdenemar@redhat.com, marcel.apfelbaum@gmail.com,
	philmd@linaro.org, wangyanan55@huawei.com, qemu-devel@nongnu.org
Cc: Hao Xiang <hao.xiang@bytedance.com>
Subject: [PATCH v4 5/7] migration/multifd: Add new migration test cases for legacy zero page checking.
Date: Fri,  1 Mar 2024 02:28:27 +0000	[thread overview]
Message-ID: <20240301022829.3390548-6-hao.xiang@bytedance.com> (raw)
In-Reply-To: <20240301022829.3390548-1-hao.xiang@bytedance.com>

Now that zero page checking is done on the multifd sender threads by
default, we still provide an option for backward compatibility. This
change adds a qtest migration test case to set the zero-page-detection
option to "legacy" and run multifd migration with zero page checking on the
migration main thread.

Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>
---
 tests/qtest/migration-test.c | 52 ++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 83512bce85..8a966364b5 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -2660,6 +2660,24 @@ test_migrate_precopy_tcp_multifd_start(QTestState *from,
     return test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
 }
 
+static void *
+test_migrate_precopy_tcp_multifd_start_zero_page_legacy(QTestState *from,
+                                                        QTestState *to)
+{
+    test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
+    migrate_set_parameter_str(from, "zero-page-detection", "legacy");
+    return NULL;
+}
+
+static void *
+test_migration_precopy_tcp_multifd_start_no_zero_page(QTestState *from,
+                                                      QTestState *to)
+{
+    test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
+    migrate_set_parameter_str(from, "zero-page-detection", "none");
+    return NULL;
+}
+
 static void *
 test_migrate_precopy_tcp_multifd_zlib_start(QTestState *from,
                                             QTestState *to)
@@ -2691,6 +2709,36 @@ static void test_multifd_tcp_none(void)
     test_precopy_common(&args);
 }
 
+static void test_multifd_tcp_zero_page_legacy(void)
+{
+    MigrateCommon args = {
+        .listen_uri = "defer",
+        .start_hook = test_migrate_precopy_tcp_multifd_start_zero_page_legacy,
+        /*
+         * Multifd is more complicated than most of the features, it
+         * directly takes guest page buffers when sending, make sure
+         * everything will work alright even if guest page is changing.
+         */
+        .live = true,
+    };
+    test_precopy_common(&args);
+}
+
+static void test_multifd_tcp_no_zero_page(void)
+{
+    MigrateCommon args = {
+        .listen_uri = "defer",
+        .start_hook = test_migration_precopy_tcp_multifd_start_no_zero_page,
+        /*
+         * Multifd is more complicated than most of the features, it
+         * directly takes guest page buffers when sending, make sure
+         * everything will work alright even if guest page is changing.
+         */
+        .live = true,
+    };
+    test_precopy_common(&args);
+}
+
 static void test_multifd_tcp_zlib(void)
 {
     MigrateCommon args = {
@@ -3592,6 +3640,10 @@ int main(int argc, char **argv)
     }
     migration_test_add("/migration/multifd/tcp/plain/none",
                        test_multifd_tcp_none);
+    migration_test_add("/migration/multifd/tcp/plain/zero-page/legacy",
+                       test_multifd_tcp_zero_page_legacy);
+    migration_test_add("/migration/multifd/tcp/plain/zero-page/none",
+                       test_multifd_tcp_no_zero_page);
     migration_test_add("/migration/multifd/tcp/plain/cancel",
                        test_multifd_tcp_cancel);
     migration_test_add("/migration/multifd/tcp/plain/zlib",
-- 
2.30.2


