Not sure on the higher level goal yet, but debug possibly, straight kernel vs 
RT kernel, etc.

Just probing on feasibility and difficulty right now.


From: Colin Walters <walt...@verbum.org>
Sent: Feb 3, 2016 16:53
To: atomic-devel@projectatomic.io
Subject: Re: [atomic-devel] Multiple kernels?

On Wed, Feb 3, 2016, at 09:42 AM, Subhendu Ghosh wrote:
>
> Can rpm-ostree grub management support multiple kernel options within a 
> single tree?

 
Is the higher level goal to have something like *both* kernel and kernel-debug 
available to boot the same tree?  In that case, the answer is definitely yes.  
While the high level "porcelain" only maintains two bootloader entries, it's 
quite possible to have more than two.  And the "completely shared userspace" is 
just a special case of the "partially shared userspace" between upgrades that 
change it.
 
The caveat is that the OSTree model at the moment only supports one kernel per 
tree - but it's easily possible to have multiple trees which happen to share 
the exact same userspace. 
 
A lot of the implementation detail comes down to the desired workflow - do we 
want the secondary kernel to go away when you upgrade, for example.

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