Re: Hang with "runaway loop modprobe net-pf-1" on Linux 3.0.4

[Shea Levy]

On 10/1/11 4:37 PM, Shea Levy wrote:
> On 09/29/2011 08:38 AM, shea@xxxxxxxxxxxx wrote:
> > Hello,
> >
> > My initrd mounts /proc and /sys, puts a tmpfs at /dev, then loads 
> > ext4. On
> > 2.6.39 (and earlier), this works fine and the initrd init continues
> > happily. On 3.0.4, however, the kernel spits out
> >
> > > request_module: runaway loop modprobe net-pf-1
> > a few times then hangs. If I drop into a shell before loading ext4 
> > and run
> > modprobe unix, the same problem occurs. The modprobe used is dynamically
> > linked with glibc (which is included in the initrd), and it is the same
> > modprobe on the working and non-working systems. From my searches, it
> > appears that CONFIG_UNIX=y instead of =m would probably solve this
> > problem, but I'd rather keep it as a module if it's possible to get it
> > working. What's going wrong here? Why does it work on 2.6.39 but not
> > 3.0.4?
> >
> > Regards,
> > Shea Levy
> >
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>
> CC'ing af_unix.c maintainers. Also, I had the same problem with 3.0.
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This ended up being a problem with how my distro builds its initrd, 
sorry for the noise.

For the curious: The problem had to do with moving the depmod logic out 
of the main Makefile and into scripts/depmod.sh. My distro doesn't use a 
single global directory for all modules, so we needed to remove the '-b 
"$INSTALL_MOD_PATH"' from the depmod command that's run after module 
installation. We did this with a sed on the Makefile, which was a noop 
once that code was moved into a different file.
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