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1743c737f5
Our QE team during automated API testing hit deadlock in ZFS, caused by lock order reversal. From one side dsl_sync_task_sync() locks dp_config_rwlock as writer and calls spa_sync_props(), which waits for spa_props_lock. From another spa_prop_get() locks spa_props_lock and then calls dsl_pool_config_enter(), trying to lock dp_config_rwlock as reader. This patch makes spa_prop_get() lock dp_config_rwlock before spa_props_lock, making the order consistent. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ryan Moeller <ryan@ixsystems.com> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Closes #10553 |
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