linux-kernel - Re: [PATCH 2/2] genhd, efi: add efi partition metadata to hd

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Message-ID: <AANLkTim6Bn++JaspY0cbpLLvi=MYBLNgUhARwKQkoYpE@mail.gmail.com>
Date:	Wed, 4 Aug 2010 01:13:19 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Will Drewry <wad@...omium.org>
Cc:	linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
	Karel Zak <kzak@...hat.com>, Tejun Heo <tj@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Joe Perches <joe@...ches.com>
Subject: Re: [PATCH 2/2] genhd, efi: add efi partition metadata to hd_structs

On Wed, Aug 4, 2010 at 00:27, Will Drewry <wad@...omium.org> wrote:
> On Tue, Aug 3, 2010 at 4:54 PM, Kay Sievers <kay.sievers@...y.org> wrote:

>> Did you already test to put a lookup-call to the in-kernel mounter, if
>> we use some special partition table uuid identifier for root=? That
>> would be nice to see, if all that works as expected, and we can get to
>> the data we collect.
>
> Not yet, but I'd like to have it working there (and in my
> device-mapper target) as soon as possible.  Hopefully, I'll have that
> done pretty soon and I'll repost the series inclusive of an init:
> change.

Nice.

> Any preferences on the variable? I'll start with your example of
> PARTUUID=, but that follows the initramfs model (UUID=) and not the
> existing magic root devices (/dev/nfs, /dev/ram).
> /dev/by-part-uuid/XXX... doesn't seem super-friendly though :)

Yeah, this stuff does not really fit in to the path notation stuff,
unless we use the udev-style link names, which some people like to
avoid, and prefer some more abstract thing here.

We have UUID=, LABEL= for mount and fstab, I think PARTUUID=,
PARTLABEL= matches this.

We can always change that, if something better comes up before this
gets official. :)

Kay
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