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b1f61f05b4
While the pool is suspended on host A, it may be imported on host B. If host A continued to write MMP blocks, it would be blindly overwriting MMP blocks written by host B, and the blocks written by host A would have outdated txg information. Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Olaf Faaland <faaland1@llnl.gov> Closes #7182