Bug#762395: systemd is not abel to boot systems with btrfs and without initramfs

[Dimitri John Ledkov]

On 22 September 2014 12:57, Michael Biebl <biebl at debian.org> wrote:
> Am 22.09.2014 um 13:27 schrieb M G Berberich:
>> Hello,
>>
>> Am Montag, den 22. September schrieb Michael Biebl:
>>> Am 21.09.2014 um 22:04 schrieb M G Berberich:
>>>> Package: systemd
>>>> Version: 208-8
>>>> Severity: normal
>>>>
>>>> Dear Maintainer,
>>>>
>>>> systemd is not able to boot a system that has btrfs-volumes in
>>>> /etc/fstab and does not use a initramfs. That is because ‘btrfs device
>>>> scan’ has to be executed bevor mounting btrfs-volumes and systemd does
>>>> not do this.
>>>>
>>>
>>> I see
>>>
>>> btrfs-tools: /lib/udev/rules.d/70-btrfs.rules
>>> btrfs-tools: /lib/udev/rules.d/80-btrfs-lvm.rules
>>>
>>> 70-btrfs.rules:RUN+="/sbin/btrfs device scan $env{DEVNAME}"
>>> 80-btrfs-lvm.rules:RUN+="/sbin/btrfs device scan $env{DEVNAME}"
>>>
>>> Can you investigate why that is not sufficient.
>>
>> A first guess: local filesystems are mounted bevor udev is working.
>
> Well, no. udev is started well before the file systems are mounted.
> Actually, udev is responsible for local file systems to be mounted since
> the mounting is event based and systemd relies on udev to trigger those
> events.
>
> I'm bringing Dimitri into the loop here, as this sounds like a bug in
> btrfs-tools to me.
>

It is my understanding that udev rules should be sufficient.
Could you please provide your /etc/fstab to reproduce this failure to boot?
Are you attempting to do initramfs-less boot with rootfs on btrfs?

-- 
Regards,

Dimitri.