Date: Sun, 23 Apr 2000 23:17:51 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: "Jordan K. Hubbard" <jkh@zippy.cdrom.com> Cc: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>, phk@critter.freebsd.dk (Poul-Henning Kamp), freebsd-current@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG Subject: Re: SMP changes and breaking kld object module compatibility Message-ID: <200004240617.XAA66270@apollo.backplane.com> References: <10872.956523122@zippy.cdrom.com>
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:I'm sure that something can be done for the kld compatibility issues
:so that you can have your SMP cake and eat it too. Just give it a bit
:more thought. :)
:
:- Jordan
Thought I have. Time I don't. While I don't particularly see a
problem staying compatible with KLD modules that do spl*() calls,
It's several day's worth of additional work when we go through
the whole review / test / test-again process. I've already gone
through this process for what was committed to -current and I have
already tested the patches under 4.x. I do not have time to go
through it yet again due to having to make additional difficult-to-test
changes.
If this is an issue I suppose core can vote on whether the SMP
cleanup should be MFC'd to 4.x. I've already laid out all the
reasons why I think it's a good idea to do. I don't have the 40
man-hours it will take to guarentee compatibility with existing kld's
(even if most are probably already compatible) so if you make that
a requirement, the result will be no MFC at all.
So you guys (core) choose -- do you want 4.x to reap the benefits of
further SMP development or not? If you choose no, beware that without
this base cleanup there is *NO* chance whatsoever of any further SMP
work being MFC'd to 4.x. None. Zilch. It will have diverged too
much.
-Matt
Matthew Dillon
<dillon@backplane.com>
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