Re: upcoming kfreebsd 9

2011-10-08 Thread Arno Töll 
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Hello Robert,

On 23.09.2011 22:26, Robert Millan wrote:
 If it is, which combinations are possible and which aren't?  Currently
 I know that:
 ...
 - 9.x kernel can run with 8.x userland

are you sure? I think I found such an incompatibility.

I backported and compiled kfreebsd-9:

ii  kfreebsd-image-9.0-0-amd649.0~svn225873-1 kernel of FreeBSD 9.0
image

and I am running it with an up to date Wheezy user land, hence libgeom1 has:

# dpkg -l | grep libgeom
ii  libgeom0  8.1-5 FreeBSD GEOM library
ii  libgeom1  8.2+ds1-4 FreeBSD GEOM library

This is the same version as Sid has, right now.

This seems to cause an ABI incompatibility between libgeom and
kfreebsd-9. Hence, update-grub fails. Some debugging output is on [1]
(warning: 1.7M log). The actual problem seems to be grub-probe here
which causes a lot of noise:

# /usr/sbin/grub-probe --device /dev/da15s1 --target=fs_uuid
[lots of similar messages stripped]
Unexpected XML: name=stripesize data=0
Unexpected XML: name=stripeoffset data=131072
Unexpected XML: name=stripesize data=0
Unexpected XML: name=stripeoffset data=131072
f5cf45616b5c3c2b

The problem seems minor, the file system uid appears nonetheless but
confuses the grub scripts. Hence I tried wrapping grub-probe by:

#! /bin/sh
/usr/sbin/grub-probe.real $@ | tail -n1

As soon as I did, grub works fine again and generates a working
grub.conf. Apparently libgeom fails to parse the output of sysctl -b
kern.geom.confxml (output in [2]).

[1] http://daemonkeeper.net/wp-content/files/grub.out
[2] http://daemonkeeper.net/wp-content/files/sysctl.out


- -- 
with kind regards,
Arno Töll
IRC: daemonkeeper on Freenode/OFTC
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Re: upcoming kfreebsd 9

2011-09-25 Thread Petr Salinger 

Even during RC series it should stay in experimental.

And with ABI number 0?


IMHO, yes, for experimental it does not matter.


But may be it is time to consider putting into experimental also
freebsd-buildutils/freebsd-libs/freebsd-utils/kfreebsd-kernel-headers/...


I think there should be a clear plan wrt 8.x and 9.x before doing
that.  Using 9.x userland in Wheezy might rule out the possibility of
supporting 8.x kernels.

First of all, is it desireable to support two branches?  In Squeeze
they weren't, but I think it'd be interesting if they would.

If it is, which combinations are possible and which aren't?  Currently
I know that:

- 9.x kernel can be built with 8.x buildutils
- 9.x kernel can run with 8.x userland

But I don't know if the reverse are true.


And that is exactly the reason for having them in experimental
and test possible combination.

In ideal world, wheezy will release with 9.x kernel (and utilities) only,
but it will be capable to run under squeeze 8.1 kernel correctly.

Petr


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Re: upcoming kfreebsd 9

2011-09-25 Thread Robert Millan 
2011/9/25 Petr Salinger petr.salin...@seznam.cz:
 If it is, which combinations are possible and which aren't?  Currently
 I know that:

 - 9.x kernel can be built with 8.x buildutils
 - 9.x kernel can run with 8.x userland

 But I don't know if the reverse are true.

 And that is exactly the reason for having them in experimental
 and test possible combination.

Makes sense.  I would be very careful before moving them to sid though.

 In ideal world, wheezy will release with 9.x kernel (and utilities) only,

I don't agree with this.  Legacy releases *are* meant for
production.  And they're more mature/stable than Production
releases.  I think it's good for end users that they can choose (note:
Debian has given this choice for Linux a number of times, e.g. v2.4 /
v2.6).

 but it will be capable to run under squeeze 8.1 kernel correctly.

If you're concerned about upgrades, in upstream Rebuilding world
document kernel is updated first.  Shouldn't we do the same?
Different upgrade path may expose different problems.

-- 
Robert Millan


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