ZFS v28 for 8.2-STABLE

[Ruslan Yakovlev]

Does actually patch exist for 8.2-STABLE ?
I probe 
http://people.freebsd.org/~mm/patches/zfs/v28/stable-8-zfsv28-20110317.patch.xz
Building failed with:
   can't cd to /usr/src/cddl/usr.bin/zstreamdump
Also sys/cddl/compat/opensolaris/sys/sysmacros.h failed to patch.

Current FreeBSD 8.2-STABLE #35 Mon Apr 18 03:40:38 EEST 2011 i386 
periodically frozen on high load like backup by rsync or find -sx ... 
(from default cron tasks).