Bug#284356: SONAME bumping and d-i
Hi Joey,
On Thu, Dec 16, 2004 at 06:33:31PM -0500, Joey Hess wrote:
> Looking at how these proposed fixes would affect d-i and existing rc2
> images:
>
> a. If the SONAME is left unchanged and the new ABI remains, and things
> are updated to use the new ABI:
> - Installs from a rc2 netinst CD will keep working, but you'll get a
> kernel with the old ABI. Installs of "third-party" (ie, alsa)
> kernel modules that use the new ABI will then fail. Until you
> upgrade your kernel..
> - Installs from a rc2 businesscard CD will be ok.
> - The rc2 netboot and floppy images will stop working once udebs
> built with the new ABI reach sarge.
> - We won't need to make any other changes to d-i aside from putting
> those udebs in sarge and rebuilding the d-i images.
> - However we won't be able to easily/widely test netboot or floppy
> installs using the new ABI kernels until the udebs reach sarge.
> The daily builds would need to be hacked to pull udebs from sid to
> do any significant testing.
> b. If the SONAME is increased and the ABI changes reverted for -1:
It is my understading that releasing -2 packages would result
in the -1 packages being removed from the debian archive as
regardless of weather the binary packages are -1, -2, or -X,
the source package is infact kernel-image-2.4.27-<arch>.
Are you proposing that we should add a new source package,
kernel-image-2.4.27-<arch>-2 which produces SONAME=2 binary packages
and leave kernel-image-2.4.27-<arch> providing the SONAME=1 packages.
Or are you suggesting that the -1 binary packages will just hang
around in the archive for a while?
> - All rc2 images will keep working until/unless the udebs from the -1
> kernels are removed from sarge, when the netboot and floppy images will
> break.
> - We'll need to build new udebs for the -2 kernels, while keeping
> the udebs from the -1 kernels. This will either mean some ugly
> linux-kernel-di packages that build both from one package, or the
> even more ugly splitting off of a linux-kernel-di-i386-2 for the
> -2 kernels. Nasty nasty nasty.
> - Changes will be needed in debian-cd to drop the -1 stuff from
> CDs to avoid space issues.
> - At the moment I think that d-i/anna will do the right thing WRT
> using the -2 udebs if the -2 kernel is running. However we've
> never been in this situation before, so something could fail.
> - Changes will be needed in rootskel to install the -2 kernel
> images. Some arches may also need base-installer changes.
> - Not sure how this affects "third party" modules in debian, do they
> have to build modules for both kernel SONAMEs? Do they drop -1
> debs? If so rc2 gets subtly broken.
> - Simply increasing the number of udebs in sarge with -2 kernel
> udebs will change d-i's memory usage, which could break 20 mb
> installs. I think we have a big gap before we need to worry about
> 32 mb installs. Still we'd need to retest everything for lowmem
> again, or remove the -1 kernel udebs before the next d-i release.
>
> I keep seeming to come up with new issues with approach b. Leaning toward
> a..
A sounds fine from my point of view, as it involves the least effort.
Although as I discovered this morning, there seems to be a second ABI
change relating to the same patch, so we should get that out ASAP.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=284356#msg68
--
Horms
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