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-rw-r--r--block-migration.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/block-migration.c b/block-migration.c
index 8da5f868af..2fd7699794 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -583,10 +583,12 @@ static int block_save_setup(QEMUFile *f, void *opaque)
DPRINTF("Enter save live setup submitted %d transferred %d\n",
block_mig_state.submitted, block_mig_state.transferred);
+ qemu_mutex_lock_iothread();
init_blk_migration(f);
/* start track dirty blocks */
set_dirty_tracking(1);
+ qemu_mutex_unlock_iothread();
ret = flush_blks(f);
blk_mig_reset_dirty_cursor();