[Bug 162690] [geom] gpart label changes only take effect after a reboot

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=162690

Andrey V. Elsukov <ae at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ae at FreeBSD.org

--- Comment #5 from Andrey V. Elsukov <ae at FreeBSD.org> ---
The problem is that GEOM_LABEL class was appointed for handling GPT labels, but
it isn't compatible to do this task. By design it handles labels from the same
GEOM provider. GPT labels are stored in the partition table metadada on the
different GEOM provider. And when you are changing the label, GEOM_LABEL
doesn't know about this, because its provider wasn't spoiled. There are several
solutions are possible:
1. Don't use GPT labels.
2. Assign GEOM_PART class for handling GPT labels and implement such
functional.
3. Probably some dirty hack can notify GEOM_LABEL about changed GPT labels.

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