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Re: [PATCH v3 13/25] iotests: 129: prepare for backup over block-copy


From: Max Reitz
Subject: Re: [PATCH v3 13/25] iotests: 129: prepare for backup over block-copy
Date: Tue, 12 Jan 2021 13:14:34 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0

On 26.10.20 18:18, Vladimir Sementsov-Ogievskiy wrote:
After introducing parallel async copy requests instead of plain
cluster-by-cluster copying loop, backup job may finish earlier than
final assertion in do_test_stop. Let's require slow backup explicitly
by specifying speed parameter.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
  tests/qemu-iotests/129 | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/qemu-iotests/129 b/tests/qemu-iotests/129
index 3c22f6448c..e9da0208c4 100755
--- a/tests/qemu-iotests/129
+++ b/tests/qemu-iotests/129
@@ -77,7 +77,7 @@ class TestStopWithBlockJob(iotests.QMPTestCase):
      def test_drive_backup(self):
          self.do_test_stop("drive-backup", device="drive0",
                            target=self.target_img,
-                          sync="full")
+                          sync="full", speed=1024)
def test_block_commit(self):
          self.do_test_stop("block-commit", device="drive0")

I still don’t like this very much. We write 128 MB of data, do_test_stop throttles the source to 1 kB/s, so even “a lot of parallel requests” shouldn’t finish immediately.

I feel like there’s a bigger problem here.

Then again, I have 129 disabled all the time anyway because its throttling simply doesn’t work, so I guess

Acked-by: Max Reitz <mreitz@redhat.com>




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