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Re: apt: calculation for /boot too conservative?

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On Wed, Oct 16, 2024 at 07:49:05AM GMT, Paul Gevers wrote:
> Package: apt
> Version: 2.9.8
> Severity: normal
> 
> Hi,
> 
> I think I just spotted a new feature of apt (thanks for the continuous
> improvements): reporting and protection of /boot. However, I think it was
> far off and hence prevented me from upgrading without looking into it.
> 
> Story is that some time ago, my /boot was too small (it came with Debian's
> default) for upgrades of the kernel, and I was advised on IRC to configure
> something regarding modules (IIRC something like: as-needed) which
> drastically reduced the used size in /boot to the extend I haven't had to
> worry about it anymore. Today it was different.
> 
> Starting point:
> 
> paul@mulciber ~ $ sudo apt full-upgrade --update
> ...
> Installing dependencies:
>   linux-doc-6.11  linux-image-6.11.2-amd64

I would assume that this is the culprit, the calculation is

size of (linux-image-6.11.2-amd64) + ( largest initrd + largest map ) * 1.1

It seems Debian kernels include modules in their image package, causing
the modules to be counted. An Ubuntu kernel image (which I tested this
against) meanwhile is true to the name and only contains the kernel image
(the modules are in linux-modules-$(uname -r)).

What are our ways out here?

* Split modules out of linux-image into linux-modules
* Add a new Boot-Size: field indicating the size of files in /boot
* Change the estimate to use the largest kernel size. This is much more
  unreliable.

We also need to have a look at packages triggering initrd generation:
Technically you need space for one additional initrd in /boot as the
new file is being written before the old one is deleted. :(


-- 
debian developer - deb.li/jak | jak-linux.org - free software dev
ubuntu core developer                              i speak de, en

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Re: apt: calculation for /boot too conservative? Julian Andres Klode <jak@debian.org> - 2024-10-16 13:20 +0200
  Processed (with 1 error): Re: apt: calculation for /boot too  conservative? "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-10-16 13:30 +0200

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