sparc64 hang with zfs v28

[Marius Strobl]

On Fri, Mar 25, 2011 at 04:57:35PM +0100, Michael Moll wrote:
> Hi,
> 
> On Tue, Mar 22, 2011 at 08:11:17PM +0100, Marius Strobl wrote:
> > With the attached patch at least my simple
> > test cases works again.
> 
> OK, I decided to upgrade one of my boxes completely and with the patch
> it also works for me when doing an installworld immediately after
> installing the new kernel without reboot.
> 
> However, the non-working v15<->v28 compatibility is IMHO a showstopper
> for MFCing v28.
> 

Due to lack of knowledge about the inner works of ZFS I think that
problem is beyond me. I could imagine that it's due to the endian
conversion being done twice but I think in that case it should
fail way earlier the game ...

Marius