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Re: [PATCH v4] templates: introduce GRUB_TOP_LEVEL_* vars
- To: The development of GNU GRUB <grub-devel@xxxxxxx>
- From: Michael Chang <mchang@xxxxxxxx>
- Date: Wed, 19 Oct 2022 14:23:13 +0800
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- Cc: Denton Liu <liu.denton@xxxxxxxxx>, Daniel Kiper <daniel.kiper@xxxxxxxxxx>, Oskari Pirhonen <xxc3ncoredxx@xxxxxxxxx>, mathieu.desnoyers@xxxxxxxxxxxx, rharwood@xxxxxxxxxx, samuel.thibault@xxxxxxxxxxxx, debian-bsd@xxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 19 Oct 2022 06:23:34 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Tue, Oct 18, 2022 at 04:18:21PM +0200, Olaf Hering wrote:
> Tue, 18 Oct 2022 06:57:36 -0700 Denton Liu <liu.denton@xxxxxxxxx>:
>
> > If I'm understanding correctly, what you're proposing is a mechanism for
> > setting the default entry. If I'm not mistaken, this seems like an
> > orthogonal discussion to me. My patch proposes a method of setting the
> > top-level menu entry while this method only sets the default entry,
> > which may be hidden behind a submenu.
>
> I think this can be done already today. At least YaST offers a way to select
> a specific item in a submenu and pass it to grub-set-default. This leads to
> an entry like this in grubenv:
>
> saved_entry=Advanced options for SLE15SP4 (with Xen hypervisor)>Xen
> hypervisor, version
> 4.17.20220823T122205.399bcbf2-xen_unstable.150400.370>SLE15SP4, with Xen
> 4.17.20220823T122205.399bcbf2-xen_unstable.150400.370 and Linux
> 5.14.21-150400.24.21-default
>
> This entry will be booted as long as both this specific Xen version and this
> specific kernel version is found. There is a slim chance a SUSE specific
> patch exists to enable this functionality.
Just to clarify. There is no specific patch, this is common function in grub.
Thanks,
Michael
>
> Maybe the patch description lacks a specific example how the proposed change
> is supposed to be used in your environment.
>
> Olaf
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