Bug#857743: reason for kernel-panic

[Andreas Glaeser]

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I am not convinced, that what you claim is true, since the hybrid-filesystem-concept
worked on pure debian-stable, it should be workable with backports included and on current
testing, too.
You can have /usr in a separate partition, the symlink-workaroud to BTRFS-constraints
should also be workable.
I will make a KVM-image with an hybrid filesystem in order to prove, that this is not an
unsupported concept, but Debian is currently suffering from some severe regressions in
the field of md-raid. md-raid has never been workable very well in asymmetric
configurations at least from my own experience.
Please don't try to shine your communication-problems by giving me incorrect facts.

 


On Thu, 16 Mar 2017 10:07:05 -0300
Felipe Sateler <fsateler at debian.org> wrote:

> On Thu, Mar 16, 2017 at 5:09 AM, Andreas Glaeser
> <bugs.andreas.glaeser at freenet.de> wrote:
> > Now I was sitting down again to install without md-raid and without XFS-root.
> > I can reconfirm, that the described problem does not appear with BTRFS-raid only:
> >  
> >> /dev/sda5      btrfs     46872576 2298224  44044944   5% /
> >> udev           devtmpfs     10240       0     10240   0% /dev
> >> tmpfs          tmpfs       769428    8936    760492   2% /run
> >> tmpfs          tmpfs      1923568       0   1923568   0% /dev/shm
> >> tmpfs          tmpfs         5120       0      5120   0% /run/lock
> >> tmpfs          tmpfs      1923568       0   1923568   0% /sys/fs/cgroup
> >> /dev/sda6      btrfs     74217472    1280  72051712   1% /home
> >> /dev/sda1      xfs         972460   88268    884192  10% /boot
> >> /dev/sdb1      xfs       30712168 3630772  27081396  12% /mnt/usb  
> 
> In this configuration /usr is a regular dir on the root filesystem.
> What caused the earlier problem was having /usr being a symlink to
> something that was not mounted by the initramfs. Debian does not
> support such configurations[1]. While you are using an initramfs, your
> configuration is such that the initramfs does not mount the filesystem
> that will end up being seen in /usr.
> 
> I'm now closing this bug, as it appears the root cause is an
> unsupported configuration. Please reopen if you can reproduce the
> issue with other configuration that does not involve /usr as a
> symlink.
> 
> 
> [1]
> https://www.debian.org/releases/stretch/amd64/release-notes/ch-information.en.html#late-mounting-usr
> 

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