From: "Jan Lübbe" <jlu@pengutronix.de>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>,
Tobias Waldekranz <tobias@waldekranz.com>,
barebox@lists.infradead.org
Cc: Richard Weinberger <richard@nod.at>,
Michael Olbrich <mol@pengutronix.de>,
anis chali <chalianis1@gmail.com>,
Marco Felsch <m.felsch@pengutronix.de>
Subject: Re: [PATCH 0/5] dm: Initial work on a device mapper
Date: Tue, 02 Sep 2025 16:46:40 +0200 [thread overview]
Message-ID: <28a00db6c1bdf69f93e6ef7210e11c5dfa368411.camel@pengutronix.de> (raw)
In-Reply-To: <24ac7ede-0f36-4283-b654-9cccdfa97a37@pengutronix.de>
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
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next prev parent reply other threads:[~2025-09-02 19:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-28 15:05 Tobias Waldekranz
2025-08-28 15:05 ` [PATCH 1/5] string: add strtok/strtokv Tobias Waldekranz
2025-08-28 15:05 ` [PATCH 2/5] dm: Add initial device mapper infrastructure Tobias Waldekranz
2025-08-28 15:05 ` [PATCH 3/5] dm: linear: Add linear target Tobias Waldekranz
2025-08-29 5:56 ` Ahmad Fatoum
2025-08-28 15:05 ` [PATCH 4/5] test: self: dm: Add test of " Tobias Waldekranz
2025-08-28 15:05 ` [PATCH 5/5] commands: dmsetup: Basic command set for dm device management Tobias Waldekranz
2025-08-29 8:29 ` [PATCH 0/5] dm: Initial work on a device mapper Sascha Hauer
2025-08-31 7:48 ` Tobias Waldekranz
2025-09-02 8:40 ` Ahmad Fatoum
2025-09-02 9:44 ` Tobias Waldekranz
2025-08-29 11:24 ` Ahmad Fatoum
2025-08-31 7:48 ` Tobias Waldekranz
2025-09-02 9:03 ` Ahmad Fatoum
2025-09-02 13:01 ` Tobias Waldekranz
2025-09-02 14:46 ` Jan Lübbe [this message]
2025-09-02 21:34 ` Tobias Waldekranz
2025-09-02 14:34 ` Jan Lübbe
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