From: Vincent Mailhol <mailhol@kernel.org>
To: Matthew Wilcox <willy@infradead.org>,
Dave Hansen <dave.hansen@intel.com>
Cc: Vincent Mailhol <mailhol@kernel.org>,
Jens Axboe <axboe@kernel.dk>, Davidlohr Bueso <dave@stgolabs.net>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
linux-efi@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org
Subject: Re: [PATCH 12/19] x86: define DPS root partition type UUIDs
Date: Mon, 15 Jun 2026 22:39:06 +0200 [thread overview]
Message-ID: <cc9b7cd3-041c-461b-aa54-dba260433261@kernel.org> (raw)
In-Reply-To: <ajA-0YJW4gLr02c7@casper.infradead.org>
On 15/06/2026 at 20:05, Matthew Wilcox wrote:
> On Mon, Jun 15, 2026 at 09:46:41AM -0700, Dave Hansen wrote:
>> There are a lot of ways to do this. I'm just not a super big fan of the
>> current proposal.
>>
>> So, boiling it down:
>>
>> 1. Should more than one UUID be supported per kernel build?
>> 2. Should the UUIDs be defined in arch code or generic code?
>> 3. Kconfig or #ifdefs?
>
> Further questions ... why do this in the kernel?
Most of the plumbing was already there so that the feature is still
tiny. It seems like a reasonable trade-off to me.
> Seems perfectly suited to be in initramfs where we can throw away the
> code after boot.
The added code uses the __init attribute for this exact reason: so that
its memory can be reclaimed after.
--
Yours sincerely,
Vincent Mailhol
next prev parent reply other threads:[~2026-06-15 20:39 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-15 16:08 [PATCH 00/19] init: discoverable root partitions, a.k.a. an omittable "root=" cmdline option Vincent Mailhol
2026-06-15 16:08 ` [PATCH 01/19] init: add DPS root partition type UUID capability Vincent Mailhol
2026-06-15 16:08 ` [PATCH 02/19] alpha: define DPS root partition type UUID Vincent Mailhol
2026-06-15 16:08 ` [PATCH 03/19] arc: " Vincent Mailhol
2026-06-15 16:09 ` [PATCH 04/19] arm: " Vincent Mailhol
2026-06-15 16:09 ` [PATCH 05/19] arm64: " Vincent Mailhol
2026-06-15 16:09 ` [PATCH 06/19] loongarch: " Vincent Mailhol
2026-06-15 16:09 ` [PATCH 07/19] mips: define DPS root partition type UUIDs Vincent Mailhol
2026-06-15 16:09 ` [PATCH 08/19] parisc: define DPS root partition type UUID Vincent Mailhol
2026-06-15 20:02 ` James Bottomley
2026-06-15 20:27 ` Helge Deller
2026-06-15 20:43 ` Vincent Mailhol
2026-06-15 16:09 ` [PATCH 09/19] powerpc: define DPS root partition type UUIDs Vincent Mailhol
2026-06-15 16:09 ` [PATCH 10/19] riscv: " Vincent Mailhol
2026-06-15 16:09 ` [PATCH 11/19] s390: " Vincent Mailhol
2026-06-15 16:09 ` [PATCH 12/19] x86: " Vincent Mailhol
2026-06-15 16:46 ` Dave Hansen
2026-06-15 18:05 ` Matthew Wilcox
2026-06-15 20:39 ` Vincent Mailhol [this message]
2026-06-15 20:19 ` Vincent Mailhol
2026-06-15 16:09 ` [PATCH 13/19] block: store GPT partition type UUID Vincent Mailhol
2026-06-15 16:09 ` [PATCH 14/19] block: add early_lookup_bdev_by_type_uuid() Vincent Mailhol
2026-06-15 16:09 ` [PATCH 15/19] block: store GPT attributes as a raw value Vincent Mailhol
2026-06-15 16:09 ` [PATCH 16/19] block: don't discover partition with DPS no-auto GPT attribute Vincent Mailhol
2026-06-15 16:09 ` [PATCH 17/19] init: factor out root device lookup into lookup_root_device() Vincent Mailhol
2026-06-15 16:09 ` [PATCH 18/19] init: discover root by DPS partition type UUID Vincent Mailhol
2026-06-15 16:09 ` [PATCH 19/19] docs: document discoverable root partitions Vincent Mailhol
2026-06-15 17:04 ` [PATCH 00/19] init: discoverable root partitions, a.k.a. an omittable "root=" cmdline option Al Viro
2026-06-15 20:33 ` Vincent Mailhol
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=cc9b7cd3-041c-461b-aa54-dba260433261@kernel.org \
--to=mailhol@kernel.org \
--cc=axboe@kernel.dk \
--cc=bp@alien8.de \
--cc=brauner@kernel.org \
--cc=dave.hansen@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=dave@stgolabs.net \
--cc=jack@suse.cz \
--cc=linux-block@vger.kernel.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@kernel.org \
--cc=viro@zeniv.linux.org.uk \
--cc=willy@infradead.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox