2.6.13 / cannot set up LDT for thread-local storage

Quoted 2 lines

What should I try? Do I need a patch?

mv /lib/tls /lib/tls.away, after loop-mounting the filesystem on the host , or booting with init=/bin/bash (not sure the second will work).

Quoted 1 line · On Fri, Jan 28, 2005 at 10:43:44PM -0500, [email protected] wrote:

Is the file /etc/environment _documented_ *anywhere*???

It's a highly non-standard, non-portable file that is source by PAM (and possibly other applications) on a Debian system.

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                  <font color="black">kernel Panic, cannot set up thread-local storage</font>
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<blockquote>
Your UML kernel doesn't support Native Posix Thread Library and the binaries you're running are being dynamically linked to the NTPL libraries. <br><br>
You can boot moving the NTPL libraries away.
<ul>
<li> <font color="black"># mount root_fs mnt-uml/ -o loop</font> <li> <font color="black"># mv mnt-uml/lib/tls mnt-uml/lib/tls.away</font> <li> <font color="black"># umount mnt-uml</font>
</ul>
If you're running Debian, you can get away with:
<pre><font color="black">

 # mount root_fs mnt-uml/ -o loop
 # echo "LD_ASSUME_KERNEL=2.4.1" >> /mnt-uml/etc/environment
 # umount mnt-uml/
</font></pre>

It seems that using /etc/environment is Debian specific,
as <a href="http://lists.debian.org/debian-user/2005/01/msg04226.html">discussed here</a>.

The LD_ASSUME_KERNEL=2.4.1 environment variable precludes the dynamic linker from using the NTPL libraries, as explained <a href="http://people.redhat.com/drepper/assumekernel.html">here</a>.

If you decide to move away /lib/tls/ and you're running Debian, you might prefer to use dpkg-divert.
<pre><font color="black">

  # export LD_ASSUME_KERNEL=2.4.1
  # mount root_fs mnt-uml/ -o loop
  # chroot mnt-uml
  # mkdir /lib/tls.off
  # cd /lib/tls
  # pwd
  #  for f in *;
     do
       dpkg-divert --divert --local --rename --divert /lib/tls.off/$f --add /lib/tls/$f;
     done
  # exit
  # umount mnt-uml
</font></pre>
</blockquote>

On 9/13/05, Blaisorblade <[email protected]> wrote:
sysvinit should have a way to add a variable to the environment. Can it be done in intitab?

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                  <font color="black">kernel Panic, cannot set up thread-local storage</font>
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<blockquote>
Your UML kernel doesn't support Native Posix Thread Library and the binaries you're running are being dynamically linked to the NTPL libraries. <br><br>
You can boot moving the NTPL libraries away.
<ul>
<li> <font color="black"># mount root_fs mnt-uml/ -o loop</font> <li> <font color="black"># mv mnt-uml/lib/tls mnt-uml/lib/tls.away</font> <li> <font color="black"># umount mnt-uml</font>
</ul>
If you're running Debian, you might prefer to use dpkg-divert. <pre><font color="black">

  # export LD_ASSUME_KERNEL=2.4.1
  # mount root_fs mnt-uml/ -o loop
  # chroot mnt-uml
  # mkdir /lib/tls.off
  # cd /lib/tls
  # pwd
  #  for f in *;
     do
       dpkg-divert --divert --local --rename --divert /lib/tls.off/$f --add /lib/tls/$f;
     done
  # exit
  # umount mnt-uml
</font></pre>
</blockquote>

Quoted 3 lines · Nelson Castillo

On 9/13/05, Blaisorblade <[email protected]> wrote:
sysvinit should have a way to add a variable to the environment. Can it be done in intitab?

I just fixed the patch for the FAQ. It's much simpler (and correct, I hope) now.

On 9/13/05, Blaisorblade <[email protected]> wrote:
(cut)

That is as maybe, but /etc/environment is the only shell-agnostic file there is, and where it can be used, it certainly serves a good purpose.
---------------------------------------

I did 2 equivalent tests
1) patching init/main.c to add the variable to the environment
2) using a wrapper to /sbin/init

sysvinit should have a way to add a variable to the environment. Can it be done in intitab?

- Do they mean standard in Debian?

BTW,

- when is NPTL (not) supported in UML?

I'm sending for your consideration a small patch for the FAQ
(that may need some update. I'll do it as I learn more about
this issue).

Thanks,
Nelson.-

1) patching init/main.c to add the variable to the environment
2) using a wrapper to /sbin/init

but it seems the environment is just discarded before running what is in inittab (I'm not sure, I should read the sources later).

sysvinit should have a way to add a variable to the environment. Can it be done in intitab?

# This module parses /etc/environment (the standard for setting

# environ vars) and also allows you to use an extended config

- Do they mean standard in Debian?