[SRU][F:linux-kvm][PULL] UBUNTU: [Config] kvm: Include master annotations

[Stefan Bader]

On 23.10.23 16:47, Thibault Ferrante wrote:
> BugLink: https://bugs.launchpad.net/bugs/2039930
> 
> SRU Justification:
> 
> [Impact]
> 
> Include master annotations and remove disabling overwrites not related 
> to hardware support.
> This will ease support for kvm derivatives until EOL.

This is probably not what should be done. This kernel differs a lot in 
what is enabled not by accident but intentionally. However it is not 
ideally named.  Unlike that name suggest this was not created as a VM 
kernel but as a fast-boot minimal kernel to quickly deploy and bring up. 
So it has not only lots of hardware disabled but also just a minimal 
support for other things to keep the footprint as small as possible.

Unfortunately, due to the naming, it got used for things we did not 
intend but even then we would only enable selected things if we really 
had to. And IMO we should stick to that.

-Stefan

> 
> [Fix]
> 
> As this a stable kernel, this may be too much already modifications, but 
> those are limited
> to enable features which are already enabled in master and shouldn't 
> break existing application.
> Only one option was disabled, CONFIG_EMBEDDED, which was unused.
> 
> [Test Plan]
> 
> Built and booted.
> Boot time are similar, the size of the generated kernel is increased by 
> a few percents.
> Specific look should be given while doing the next cranking for regression.
> 
> [Where problems could occur]
> 
> Quite a number of configuration has been changed.
> Those are mainly focused on protocol/network, kernel debugging features 
> (BPF/Kprobes/Ftrace),
> or filesystems support, including NFS.
> 
> [Other Info]
> 
> If this change land without issues, we may want to port these changes to 
> other kvm derivatives.
> 
> 
> ----------------------------------------------------------------
> The following changes since commit 
> dad75ffb821b7052f17c8e0c44e96a0d6ef2b21f:
> 
>    UBUNTU: Ubuntu-kvm-5.4.0-1102.108
> 
> are available in the Git repository at:
> 
>    git+ssh://thibf@git.launchpad.net/~thibf/+git/focal-linux lp_2039930
> 
> for you to fetch changes up to 5c470107ed22c965234635b77bcc427fbcd46135:
> 
>    UBUNTU: [Config] kvm: Match master misc configs
> 
> ----------------------------------------------------------------
> Thibault Ferrante (7):
>    UBUNTU: [Config] kvm: Include master annotations
>    UBUNTU: [Config] kvm: Enable kernel debugging options
>    UBUNTU: [Config] kvm: Enable kernel network/protocol options
>    UBUNTU: [Config] kvm: Enable kernel filesystems options
>    UBUNTU: [Config] kvm: match NLS_CODEPAGE config
>    UBUNTU: [Config] kvm: Enable kernel scheduler options
>    UBUNTU: [Config] kvm: Match master misc configs
> 
>   .../abi/5.4.0-1101.107/amd64/kvm.modules      |   19 -
>   debian.kvm/config/annotations                 | 7711 +++++++++++++----
>   2 files changed, 5833 insertions(+), 1897 deletions(-)
> 
> 

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