On Tue, 2025-09-02 at 11:03 +0200, Ahmad Fatoum wrote: > > Yeah I noticed that, _very_ useful. For Infix, if we end up going with > > LVM, I suspect we won't be able to send all of that info along with the > > commandline, and will end up needing to figure that out (again) in an > > initramfs - but for most cases I think it would work really well! > > Ah, didn't think of LVM. If mix-and-match is no problem for you, then > doing it in the initramfs is a workable solution of course.
If you are thinking about LVM, you may want to take a look at how Android is using dm-linear for "dynamic partitions": https://source.android.com/docs/core/ota/dynamic_partitions/ab_launch https://source.android.com/docs/core/ota/dynamic_partitions/implement This is also related to virtual A/B: https://source.android.com/docs/core/ota/virtual_ab The components are "snapuserd" and "dm-user" (which was not merged): https://lpc.events/event/11/contributions/1049/attachments/826/1562/2021%20LPC_%20dm-snapshot%20in%20user%20space.pdf https://lwn.net/Articles/838986/ I'm not sure what they use at the moment... Regards, Jan -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
