bug#26339: [PATCH 02/18] system: Add extlinux support.

[Danny Milosavljevic]

Hi,

On Tue, 09 May 2017 22:40:23 +0200
address@hidden (Ludovic Courtès) wrote:

> > -> It was ok with one bootloader, it's more problematic with multiple  
> > bootloaders. For example switching between two generations with two
> > different bootloaders.  
> 
> OTOH, if it turns out to be safer to keep the current bootloader, which
> is likely I think, then perhaps it’s best to not try to change.
> 
> I mean, I prefer a rollback that doesn’t roll back the bootloader over a
> rollback that tries to do something smart and makes the system
> unbootable.

If there is a switch between extlinux and grub, the bootloader config file 
format (and name, too) will change.

So if you do switch the config file out but don't switch the actual bootloader 
out it will not boot, right?

That means we have to take care that this doesn't happen.

I still think an easy way would be to just always install the config files for 
all the bootloaders that we support.  That way if there is a bootloader that 
knows any of the configs, it will boot.  Can't think of a downside either.