From mboxrd@z Thu Jan  1 00:00:00 1970
From: lyndat3-p/IIKWkZnU0S+FvcfC7Uqw@public.gmane.org
Subject: How to have dracut conditionally add different kernel modules for
 different kernels?
Date: Fri, 10 Apr 2015 12:11:53 -0700
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To: initramfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

The distro I use, opensuse, has switched to using dracut for initrd creation.

Prior to dracut usage, kernel-flavor-specific loading -- particularly for the case of Xen -- could be defined in

 /etc/sysconfig/kernel
  ...
  INITRD_MODULES="processor thermal ahci fan jbd ext3 edd"
  DOMU_INITRD_MODULES="xennet xenblk"
  ...

On 'old' mkinitrd, if both -xen and non-xen kernels were installed, initrd's were created for each.  In the xen case the modules defined in "DOMU_INITRD_MODULES" were conditionally added to the initrd-xen.

Since the  switch to dracut, module config/loading is defined in dracut.conf & dracut.d/*conf

But the 

add_drivers+=" ... " 

is apparently added for all kernels.

What's the right way to add kernel-specific modules in dracut, so that for example the xen mods are ONLY added in the xen case?

LT