Status update on v15 import

[M. Warner Losh]

In message: <4C3420AD.8040709 at FreeBSD.org>
            Martin Matuska <mm at FreeBSD.org> writes:
: Hi all,
: 
: I have some update on the status of the v15 upgrade:
: 
: - crafted a new patch that follows steps of Solaris 10 going v15 (many
: more revisions added)
: - released a CFT on freebsd-current@, with very detailed patch
: information including Solaris 10 patch numbers
: - positive testing reports from running on i386, amd64 and sparc systems
: (and cross-importing pools, etc.)
: - the patch is now ready for head, I will commit it right after 8.1 gets
: released
: - an UPDATING entry will give notice about pool upgrading and that the
: new utilities need a new kernel
: 
: I have tested the binary compatibility with older utilities as well, and
: it works properly, here is the matrix:
: 
: Old kernel, old userland: OK
: Old kernel, new userland: ERROR
: New kernel, old userland: OK
: New kernel, new userland: OK
: 
: So this fullfills the import constraint into stable/8, I will tag the
: commit with a 2-month MFC after:

Actually, old kernel + new userland == ERROR does not necessarily
fulfill the import constraints.  What does ERROR mean here?   For
-current it might be alright (might here depends on what the
consequences are).  For -stable, the bar is much higher.  Again, it
might be OK, but what are the consequences of this error?

While the project might not support totally arbitrary movements with
kernel and userland, each case is judged based on the consequences of
the errors.

Warner

: Link to the patch information file, including all imported revisions,
: bug-ids and reference to Solairis 10 patch numbers:
: http://people.freebsd.org/~mm/patches/zfs/v15/head-v15-v3.html
: http://people.freebsd.org/~mm/patches/zfs/v15/head-v15-v3.txt
: 
: Direct link to the patch:
: http://people.freebsd.org/~mm/patches/zfs/v15/head-v15-v3.patch
: 
: And I repeat: the patch applies cleanly against stable/8 as well (and
: works).
: 
: Cheers,
: mm
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