41f2a9c81f
Code for pools before version 11 uses dmu_objset_find_dp() to scan for children datasets/clones. It calls enqueue_clones_cb() and enqueue_cb() callbacks in parallel from multiple taskq threads. It ends up bad for scan_ds_queue_insert(), corrupting scn_queue AVL-tree. Fix it by introducing a mutex to protect those two scan_ds_queue_insert() calls. All other calls are done from the sync thread and so serialized. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Brian Atkinson <batkinson@lanl.gov> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #16162 |
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