[arch-general] [aur-general] [arch-dev-public] final leg of /lib removal

[Dave Reisner]

On Tue, Jul 03, 2012 at 07:56:32PM +0200, Ike Devolder wrote:
> Op dinsdag 3 juli 2012 11:41:08 schreef Dave Reisner:
> > Hey all,
> > 
> > *** If you use a custom kernel, this will affect you. Please read the
> > big scary note at the end ***
> > 
> > I'm taking today to work on the last roadblock before Allan can move
> > glibc out of /lib. This basically consists of a rebuild of:
> > 
> > - kmod (to drop our local patch)
> > - linux, linux-lts (diff for linux here: http://paste.xinu.at/LLd/)
> > - all OOT kernel modules (for /usr/lib/modules/extramodules-*)
> > - bash-completion (temp patch until /lib is a symlink:
> > http://paste.xinu.at/xEs/)
> > 
> > I'll be doing this all locally to avoid building against allan's new
> > toolchain in [staging]. This will hopefully all hit [testing] by the
> > end of the day. You know where to find me if you have any questions or
> > angry rants.
> > 
> > If you'd like to do some early testing, I'm leaving the rebuilt kmod and
> > kernel packages on gerolde:
> > 
> > http://dev.archlinux.org/~dreisner/linux-usrmove/
> > 
> > (i686 packages are lagging behind at the moment)
> > 
> > BIG SCARY NOTE: Due to the kmod changes, this will BREAK all module
> > tools for users with their own kernels. If you do not rebuild your
> > kernel after pulling in the new kmod, you're going to have a bad time.
> > See the paste link above for inspiration.
> > 
> > Cheers!
> > Dave
> 
> I'm replying on this in arch-general and aur-general because i cant post in 
> arch-dev.
> 
> So if i understand correctly we (the people running custom kernels) can't 
> prepare for this ?

I posted the new kmod package here explicitly so that users can get this
package in preparation... I'll post it again since I changed the server
I'm hosting these on:

updated URL: http://pkgbuild.com/~dreisner/linux-usrmove/

> There is no way of moving the modules already to /usr/lib ? I assume kmod now 
> only looks in /lib.

Currently, kmod is patched to respect config dirs in /usr/lib, but
modules in /lib. After removing the patch, it uniformly searches
/usr/lib for everything (I'm intentionally ignoring /etc and /run here).

> Another note, people with custom repositories should move their kernels in 
> sync with the official repositories ?
> 
> --Ike

As with any large change, I'll mention on dev-public when this goes to
testing, and there will be an associated news item when it moves to
core. I realize this is a harsh change, but I don't really have many
options for doing this more smoothly. If you're using the stock kernel,
this should all just work. mkinitcpio has supported this setup for
months now, and I've had my own kernel in /usr/lib/modules for almost as
long.

Worst case scenario, users of custom kernels can:

- manually move /lib/modules/mycustomkernel to /usr/lib/modules/ until
  they can do a proper rebuild.
- boot a stock -ARCH kernel (you DO have it listed as a fallback,
  right?) until they can do a proper rebuild.

Emphasis on "until they can do a proper rebuild". It's important that
this all gets done before we introduce a new glibc package that wipes
out /lib entirely. If you have custom kernel bits lying around in
/lib/modules, it's going to block the eventual glibc upgrade that brings
this (no, it won't be immediately with 2.16).

dave
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