What were you trying to do that didn't work?

When I try provision RHEL.9.0.0 to LPAR by HMC, installation would failed because of the length of kernel params

Please provide the package NVR for which bug is seen:

z16 machine

RHEL-9.0.0-updates-20240521.39:

kernel-5.14.0-70.101.1.el9_0
qemu-kvm-6.2.0-11.el9_0.8
seabios-1.15.0-1.el9
sgabios-0.20180715git-8.el9
edk2-20220126gitbb1bba3d77-3.el9_0.4

libtpms-0.9.1-0.20211126git1ff6fe1f43.el9
swtpm-0.7.0-3.20211109gitb79fd91.el9_0
mdevctl-1.1.0-4.el9
sevctl-0.2.0-4.el9
nmap-7.91-10.el9
ksmtuned-0.1.0-1.el9
kernel-rt-5.14.0-70.101.1.rt21.173.el9_0
libvirt-8.0.0-8.6.el9_0

RHEL-9.0.0-updates-20240507.90:

kernel-5.14.0-70.100.1.el9_0
qemu-kvm-6.2.0-11.el9_0.8
seabios-1.15.0-1.el9
sgabios-0.20180715git-8.el9
edk2-20220126gitbb1bba3d77-3.el9_0.4

libtpms-0.9.1-0.20211126git1ff6fe1f43.el9
swtpm-0.7.0-3.20211109gitb79fd91.el9_0
mdevctl-1.1.0-4.el9
sevctl-0.2.0-4.el9
nmap-7.91-10.el9
ksmtuned-0.1.0-1.el9
kernel-rt-5.14.0-70.100.1.rt21.172.el9_0
libvirt-8.0.0-8.6.el9_0

How reproducible:

100%

Steps to reproduce

1.  load install tree from nfs in HMC (select generic.ins)
2. enter kernel parameters:
   1. ro ramdisk_size=40000 cio_ignore=all,!condev
   2. inst.repo=<install tree url>
   3. rd.znet=qeth,0.0.0620,0.0.0621,0.0.0622,layer2=1,portname=foo
   4. ip=10.0.173.14::10.0.173.254:255.255.255.0:rdu-z16-l27:enc620.327:none
      vlan=enc620.327:enc620
   5. nameserver=10.11.5.160
   6. rd.zfcp=0.0.a400,0x5005076810274E12,0x0000000000000000
   7. ^d
3. start installation

Expected results

installation succeeds

Actual results

Installing boot loader
.================================================================================
================================================================================
Question

 The following error occurred while installing the boot loader. The system will
 not be bootable. Would you like to ignore this and continue with installation?
 
 Error: The length of the parameters line (3754 bytes) exceeds the allowed
 maximum (896 bytes): No such file or directory

Please respond 'yes' or 'no':