Control: clone -1 -2
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Control: retitle -2 linux-*: Provide information about /boot space usage Control: seveirty -2 wishlist

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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