File-Backed ZFS Kernel Panic still in 10.1-RELEASE (PR 195061)

[Will Green]

Hello,

I have been updating my ZFS tutorials for use on FreeBSD 10.1. To allow users to experiment with ZFS I use file-backed ZFS pools. On FreeBSD 10.1 they cause a kernel panic. 

For example a simple command like the following causes a panic: zpool create /tmp/zfstut/disk1

This issue was identified in PR 195061: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195061 
And fixed in r274619 (2014-11-17): https://svnweb.freebsd.org/base?view=revision&revision=274619 

However, even on 10.1-RELEASE-p9 the kernel panic still occurs (but doesn’t on 11-CURRENT).

Are there any plans to patch this in 10.1? I note it’s not in the errata.

My tutorials are not the only ones that use file-backed ZFS: new users experimenting with ZFS on FreeBSD are likely to encounter this issue.

Thanks,
Will