Comment # 7 on bug 1191322 from Ulrich Windl

(In reply to Martin Wilck from comment #5)
> Can you see which packages triggered the update-booloader invocations?

Unsure I'll find it from the logs, but my guess is (among others): lvm2,
virtual box kernel modules, kernel modules, kernel, mdadm, device mapper, etc.
> 
> Unless I'm mistaken, calling grub2-mkconfig isn't that expensive, unless you
> have enabled the OS prober and have a lot of parallel OS installations.

On that machine OS-prober is on (it always was), and it takes *a lot* of time.

> initramfs building takes much more time.

Well I didn't find a way to find the dracut invocations, but my guess is at
least 10 during upgrade.