[systemd-devel] [ANNOUNCE] systemd 211

[Lennart Poettering]

On Wed, 12.03.14 10:23, Thomas Bächler (thomas at archlinux.org) wrote:

> > CHANGES WITH 211:
> > 
> > [...]
> > 
> >         * systemd-gpt-auto-generator is now able to discover /srv and
> >           root partitions in addition to /home and swap partitions. It
> >           also supports LUKS-encrypted partitions now. With this in
> >           place automatic discovery of partitions to mount following
> >           the Discoverable Partitions Specification
> >           (http://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec)
> >           is now a lot more complete. This allows booting without
> >           /etc/fstab and without root= on the kernel command line on
> >           appropriately prepared systems.
> 
> I had no time to look into this yet, but there's something wrong. I
> don't have GPT partitions on this machine (so the generator shouldn't do
> anyting), but I get an error during boot:
> 
> [    4.634733] evey systemd-gpt-auto-generator[226]: Out of memory.
> 
> I do have plenty of free memory available, so there is probably an
> incorrect log_oom() somewhere in there.

Hmmmm. Any chance you could run the generator in a gdb and check where
this happens?

Use something like this:

    rm -rf /tmp/gpt-test ; mkdir /tmp/gpt-test ; gdb --args /usr/lib/systemd/system-generators/systemd-gpt-auto-generator /tmp/gpt-test /tmp/gpt-test /tmp/gpt-test

And then set a breakpoint to log_oom():

    b log_oom

And then run it:

    r

This should then run an break where the incorrect OOM happens. Then, get
me a backtracke please:

    bt full

Thanks!

Lennart

-- 
Lennart Poettering, Red Hat