[systemd-devel] systemd blocks update kernel partition table

[Jérémy Rosen]

systemd creates .device for any partition it finds, but that doesn't 
mean the partition is mounted.

You should trust "mount" in this case. Your partition is not mounted and 
I don't think this is a systemd problem. People on the yocto side are 
probably more able to help

now, that being said, I am not sure what "the kernel partition table" is 
in this context. I assume parted is trying to refresh the way the kernel 
sees the partitions on the eMMC and fails, which would be a pure kernel 
problem.

If you repartition your eMMC and then reboot on the sd-card, does your 
kernel see the partitions correctly ?
It kinda seems to me that everything is working fine here, and that the 
message is a red herring...

On 21/11/2018 23:38, e-stl at gmx.de wrote:
> Sorry for my html mail before!
>
> Hi list,
> i'm new to systemd and are working with an embedded device with yocto.
>   
> In my embedded device i want to format and store my emmc device with the new firmware. When updating the firmware the device boots from SD card.
>   
> When updating the firmware i want to (re)partition my emmc storage device with parted and 3 ext4 partitions. None of the partitions is mounted, because the device boots from SD card.
> When the emmc already contains a partition table parted complains that it can't update the kernel partition table after it was modified.
> It seems these partitions are already mounted anywhere. partprobe doesn't help either.
>   
> But i don't mount them and when i check for mounted partitions by mount command, none of them is mounted. The only thing i see is that systemd has created device units for these partitions. In syslog i see that the ext4 partition is recognized (also in /sys/fs/ext4 available). I assume that the systemd device units block the update of the kernel partition table.
>   
>
> I need to modify, format and fill the partitions on the emmc without booting after the new partition table is written.
>   My question is: What/is systemd blocking the update of the kernel partition table and what can i do to prevent it?
>   
> Thanks in advance
> Eberhard
>   
>   
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> systemd-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/systemd-devel

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