Bug#763620: initramfs depends on DEVTMPFS now?

[Michal Hocko <mstsxfx@gmail.com>]

On Sat, Oct 04, 2014 at 06:25:12PM +0100, Ben Hutchings wrote:
> Control: tag -1 moreinfo
> 
> On Wed, 2014-10-01 at 14:39 +0200, Michal Hocko wrote:
> > Package: initramfs-tools
> > Version: 0.117
> > Severity: normal
> > 
> > Hi,
> > I had to revert back to 0.116 version of the package becasue my kernel
> > didn't boot when initrd has been generated by 0.117 version becasue of
> > the missing CONFIG_DEVTMPFS. System cannot find /sbin/init as the
> > result.
> > 
> > I have checked the changelog between the to versions and it doesn't
> > mention this new requirement for the kernel configuration. Is this
> > change intentional?
> 
> initramfs-tools relies on udev to create device nodes, and that now
> requires CONFIG_DEVTMPFS:
> 
> systemd (204-4) unstable; urgency=low
> 
>   * Add preinst check to abort udev upgrade if the currently running kernel
>     lacks devtmpfs support. Since udev 176, devtmpfs is mandatory as udev no
>     longer creates any device nodes itself. This only affects self-compiled
>     kernels which now need CONFIG_DEVTMPFS=y.  Closes: #722580
> 
> However this should also affect an initramfs newly built with
> initramfs-tools 0.116.
> 
> Which version of udev is installed?

175-7.2 (which is from stable) to stay away from systemd.

> Did you rebuild the initramfs or revert to a backup version?

I have reverted to 0.116 which works just fine. I am perfectly OK with
staying with this version but maybe the newer version should depend on
systemd so the reason for this requirement is clear.

Thanks!
-- 
Michal Hocko