ZFS hang in zfs_freebsd_rename

[Bengt Ahlgren]

Andriy Gapon <avg at FreeBSD.org> writes:

> 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.

OK, good to know.  I assume this means that it would be beneficial to
extract more information if this deadlock happens again, regardless of
whether or not I have had the time to upgrade to 10.x.

Bengt