[Expired for linux (Ubuntu Xenial) because there has been no activity
for 60 days.]
** Changed in: linux (Ubuntu Xenial)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1675086
Title:
Kernel Bug when using nfsroot + overlayroot at the same time
Status in linux package in Ubuntu:
Expired
Status in linux source package in Xenial:
Expired
Bug description:
Hi,
this affects version signature Ubuntu 4.4.0-21.37-generic 4.4.6 (as
reported by initramfs), ARCH: amd64
I have installed ubuntu 16.04 via debootstrap in a chroot environment.
I can PXE boot this environment via NFS using the following Kernel
parameters without a problem:
root=/dev/nfs initrd=initrd.gz nfsroot=10.23.23.1:/mnt/lab ip=dhcp ro
(initramfs generated with 'mkinitramfs -v -o ~/initrd.img
4.4.0-21-generic'. I can attach the whole initramfs.conf, if desired)
As soon as I enable overlayroot (using tmpfs as overlay target), the
machine hangs at boot.
In order to debug this issue, I have appended the
break=init
kernel parameter.
In busybox I can then see that the overlay is mounted. However, if I try to
chroot into it, I get a stacktrace (see attached screenshot).
The overlay seems to be readable, but not writeable.
('touch file' works, but there is nothing there afterwards)
`apport-collect` is not available in initramfs, therefore no log could
be attached.
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