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Re: grub2 + xen + lz4 kernels

From: Andy Smith
Subject: Re: grub2 + xen + lz4 kernels
Date: Mon, 29 Nov 2021 23:31:55 +0000
User-agent: NeoMutt/20170113 (1.7.2)

Hi Shaun,

On Mon, Nov 29, 2021 at 11:25:22PM +0000, Shaun Reitan wrote:
> There are a few workarounds out their, most involve a hook that decompresses
> the kernel after an update but I'm not wanting to add complexity to the
> kernel update process.

Another option is to switch the guest to Xen PVH mode. The Grub2 PVH
image can boot LZ4-compressed kernels and all versions of Ubuntu
that use LZ4 kernels also support booting as a PVH mode guest
without any change to the guest.

grub-mkimage -O i386-xenpvh -o /opt/grub/lib/pvhgrub.bin …

I am not sure that you will find anyone to work on Xen PV support
any more as I think Xen upstream would rather see you move to PVH.


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