And it appears that what is wrong is the code. During bulk stage we
need to make sure that some block is dirty, but no games with
max_size at all.

Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 migration/block.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/migration/block.c b/migration/block.c
index b3d680af75..39ce4003c6 100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -879,8 +879,8 @@ static void block_save_pending(void *opaque, uint64_t max_size,
     blk_mig_unlock();
 
     /* Report at least one block pending during bulk phase */
-    if (pending <= max_size && !block_mig_state.bulk_completed) {
-        pending = max_size + BLK_MIG_BLOCK_SIZE;
+    if (!pending && !block_mig_state.bulk_completed) {
+        pending = BLK_MIG_BLOCK_SIZE;
     }
 
     trace_migration_block_save_pending(pending);
-- 
2.37.2

On Mon, Oct 03, 2022 at 05:15:56AM +0200, Juan Quintela wrote:
> And it appears that what is wrong is the code. During bulk stage we
> need to make sure that some block is dirty, but no games with
> max_size at all.
> 
> Signed-off-by: Juan Quintela <quintela@redhat.com>
> ---
>  migration/block.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>