On 15/12/2015 16:52, Bengt Ahlgren wrote: > So this is likely fixed then in 10.x? No and neither in head / current. We haven't had any fixes in ZFS<->VFS code for quite a long while. And this is a FreeBSD-specific problem. zfs_rename() does not behave as VOP_RENAME should do with respect to the vnode locking. -- Andriy Gapon