Bug 1032522 - Restriction in number of parameters in param file
Restriction in number of parameters in param file
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: anaconda (Show other bugs)
s390x All
unspecified Severity medium
: rc
: ---
Assigned To: Anaconda Maintenance Team
Release Test Team
Depends On:
Blocks: 744225
  Show dependency treegraph
Reported: 2013-11-20 05:50 EST by IBM Bug Proxy
Modified: 2013-12-12 14:11 EST (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-12-12 14:11:52 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
.prm file (954 bytes, text/plain)
2013-11-20 06:04 EST, IBM Bug Proxy
no flags Details

External Trackers
Tracker ID Priority Status Summary Last Updated
IBM Linux Technology Center 100170 None None None Never

  None (edit)
Description IBM Bug Proxy 2013-11-20 05:50:25 EST

Comment 1 IBM Bug Proxy 2013-11-20 05:50:31 EST
Problem Description
This issue is observed in RHEL7.0 pre beta

Steps to reproduce 
1. Add more than 30 parameters in .prm file, 
2. kickstart the installation

What is the restriction for number of parameters in param file? 

 if its exceeds then what is the way to use conf file?
Param file attached
Comment 3 IBM Bug Proxy 2013-11-20 06:04:20 EST
Created attachment 826565 [details]
.prm file
Comment 4 Jan Stodola 2013-11-20 11:11:12 EST
You can use conf file the same way as in RHEL-6 -use CMSDASD and CMSCONFFILE boot options in your parameter file, for example:

ro ramdisk_size=40000 cio_ignore=all,!0.0.0009

Conf file from RHEL-6 should not need any modification to work in RHEL7, for example:

HOSTNAME="hostname" IPADDR="xx.xx.xx.xx"
NETMASK="xx.xx.xx.xx" GATEWAY="xx.xx.xx.xx"
DNS="xx.xx.xx.xx" MTU="4096"
FCP_1="A007 0x500507630503C73D 0x4020400700000000"
FCP_2="A007 0x500507630503C73D 0x4020400600000000"

Regarding the number of parameters in parameter file - it seems that it is not possible to use more than 891 characters in the parameter file - if the parameter file is longer, only the first 891 characters are visible in /proc/cmdline:

[anaconda root@rtt7 ~]# cat /proc/cmdline | wc -c
[anaconda root@rtt7 ~]#

I found following in source code of kernel:
jstodola@unused-4-186 ~/tmp/kernel/linux-3.10.0-53.el7$ grep -ri ARCH_COMMAND_LINE_SIZE
arch/s390/kernel/early.c:       COMMAND_LINE[ARCH_COMMAND_LINE_SIZE - 1] = 0;
arch/s390/kernel/early.c:         EBCASC(COMMAND_LINE, ARCH_COMMAND_LINE_SIZE);
arch/s390/kernel/early.c:         ARCH_COMMAND_LINE_SIZE);
arch/s390/include/uapi/asm/setup.h:#define ARCH_COMMAND_LINE_SIZE       896
jstodola@unused-4-186 ~/tmp/kernel/linux-3.10.0-53.el7$
Comment 5 David Cantrell 2013-12-12 14:11:52 EST
Closing per comment #4.  Lots of parameters have to use the CMSCONFFILE as did previous RHEL releases.  The limitation of the param file contents is not imposed by us, that's an IBM limitation.

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