The RHEL 5.5 installer initrd checks for the well-known kernel params
CMSDASD and CMSCONFFILE, exposed as env vars:
linuxrc.s390:
12 # Copyright (C) IBM Corp. 2008,2009
13 # Author: Steffen Maier <[email protected]>
...
35 VERSION=1.2
...
2757 # Parse configuration
2758 if [ -n "$CMSDASD" -a -n "$CMSCONFFILE" ]; then
2759 readcmsfile $CMSDASD $CMSCONFFILE
2760 source /tmp/$CMSCONFFILE #2>/dev/null
2761 fi
documented at
http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.5/html/Installation_Guide/s1-s390-steps-vm.html
however, I see the actual PARM being lowercased, e.g.
CP IPL 222 PARM rdinit=/bin/sh CMSDASD=234
(minidisk 222 prepared earlier with zipl)
results in an initrd shell showing:
# env
cmsdasd=234
Because the /sbin/init script is looking for CMSDASD, but the passed
parm has been lowercased to cmsdasd, it is ignored.
I see some discussion in the list archives about why the PARM values are
lowercased, but surely the init script should match? The docs have had
this syntax for years, which makes me suspect user error (my own) rather
than a genuine bug. Does it matter that I'm passing PARM directly in the
IPL command, rather than punching everything into the reader?
Cheers,
Phi
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