K 10
svn:author
V 7
delphij
K 8
svn:date
V 27
2013-10-25T15:45:29.136013Z
K 7
svn:log
V 489
MFC r253816: MFV r253780:

To quote Illumos #3875:

The problem here is that if we ever end up in the error
path, we drop the locks protecting access to the zfsvfs_t
prior to forcibly unmounting the filesystem. Because z_os
is NULL, any thread that had already picked up the zfsvfs_t
and was sitting in ZFS_ENTER() when we dropped our locks
in zfs_resume_fs() will now acquire the lock, attempt to
use z_os, and panic.

Illumos ZFS issues:
  3875 panic in zfs_root() after failed rollback

END