Question about initramfs differences in RHEL7 and RHEL8

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We're having this issue where we see different behavior on KVM guest
images between RHEL7 and RHEL8. See this BZ:

What's happening is that the initramfs in RHEL7 contains the Xen
drivers required for running these images on EC2 instances (and more
than 600 drivers), while the initramfs in RHEL8 doesn't contain these
drivers (it contains only 177 drivers), strangely enough the upcoming
RHEL8.3 images seem to contain these drivers (and again much more than
just 177 drivers).

The kickstart files in all these cases don't explicitly call dracut to
add these drivers.

I am suspecting it might be the way anaconda calls dracut to generate
the initramfs might've changed between RHEL7 and RHEL8 and that caused
this change in behaviour. Any ideas where to look?


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