Re: [Xen-devel] [PATCH] read grubenv and set default from saved_entry or next_entry

[Steven Haigh <netwiz@xxxxxxxxx>]

On 2019-08-16 15:25, Steven Haigh wrote:
> On 2019-08-16 05:05, YOUNG, MICHAEL A. wrote:
> > On Thu, 15 Aug 2019, Steven Haigh wrote:
> >
> > > Having a bit of a look here....
> > >
> > > My test system grubenv file has:
> > > # GRUB Environment Block
> > > saved_entry=0
> > > kernelopts=root=UUID=5346b4d9-885f-4673-8aff-04a16bf1971a ro
> > > rootflags=subvol=root selinux=0 rhgb quiet
> > > boot_success=1
> > > #################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################
> > I have attached a revision of the first patch which should handle a
> > numeric saved_entry.
> Hi Michael,
>
> I tried this - and it successfully works for systems that have 
> saved_entry=0.
> I noticed that stock installs still have problems with updating
> grubenv from new kernel installs. I had to manually regenerate
> grub.cfg after upgrading to kernel 5.2.8. grubenv doesn't seem to get
> changed at all unless you manually use 'grub2-set-default 0'
>
> $ rpm -qa | grep kernel | sort
> kernel-5.1.15-300.fc30.x86_64
> kernel-5.2.8-200.fc30.x86_64
> kernel-core-5.1.15-300.fc30.x86_64
> kernel-core-5.2.8-200.fc30.x86_64
> kernel-headers-5.2.8-200.fc30.x86_64
> kernel-modules-5.1.15-300.fc30.x86_64
> kernel-modules-5.2.8-200.fc30.x86_64
>
> $ rpm -qa | grep grub | sort
> grub2-common-2.02-81.fc30.noarch
> grub2-pc-2.02-81.fc30.x86_64
> grub2-pc-modules-2.02-81.fc30.noarch
> grub2-tools-2.02-81.fc30.x86_64
> grub2-tools-efi-2.02-81.fc30.x86_64
> grub2-tools-extra-2.02-81.fc30.x86_64
> grub2-tools-minimal-2.02-81.fc30.x86_64
> grubby-8.40-31.fc30.x86_64
> grubby-deprecated-8.40-31.fc30.x86_64
>
> $ cat /etc/default/grub
> GRUB_TIMEOUT=1
> GRUB_DEFAULT=saved
> GRUB_DISABLE_SUBMENU=true
> GRUB_TERMINAL_OUTPUT="console"
> GRUB_CMDLINE_LINUX="audit=0 selinux=0 console=hvc0"
> GRUB_DISABLE_RECOVERY="true"
> GRUB_ENABLE_BLSCFG=false
>
> It seems we still have issues with this configuration - but this is a
> Fedora 30 problem -  not Xen.
Sorry, forgot to add this for using the functionality of saved_entry=0.

Tested-by: Steven Haigh <netwiz@xxxxxxxxx>

Have not tested using a string as the entry - as all of my installs seem 
to have other problems wrt semi-related fedora issues.
--
Steven Haigh

? netwiz@xxxxxxxxx     ? http://www.crc.id.au
? +61 (3) 9001 6090    ? 0412 935 897

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