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sysconfig: add zfcp.allow_lun_scan to KDUMP_COMMANDLINE_REMOVE on s390

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Resolves: bz2149846
Upstream: Fedora
Conflict: Move to kdump.sysconfig.s390 due to missing
          677da8a ("sysconfig: use a simple generator script to maintain")

Author: Philipp Rudo <prudo@redhat.com>
Date:   Tue Mar 7 14:45:35 2023 +0100

    sysconfig: add zfcp.allow_lun_scan to KDUMP_COMMANDLINE_REMOVE on s390

    Probing unnecessary I/O devices wastes memory and in extreme cases can
    cause the crashkernel to run OOM. That's why the s390-tools maintain
    their own module, 95zdev-kdump [1], that disables auto LUN scanning and
    only configures zfcp devices that can be used as dump target. So remove
    zfcp.allow_lun_scan from the kernel command line to prevent that we
    accidentally overwrite the default set by the module.

    [1] https://github.com/ibm-s390-linux/s390-tools/blob/master/zdev/dracut/95zdev-kdump/module-setup.sh

    Signed-off-by: Philipp Rudo <prudo@redhat.com>
    Reviewed-by: Coiby Xu <coxu@redhat.com>

Signed-off-by: Philipp Rudo <prudo@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
This commit is contained in:
Philipp Rudo 2023-03-13 13:53:57 +01:00 committed by Pingfan Liu
parent c382a97ef5
commit ec352352fd
1 changed files with 1 additions and 1 deletions
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2
kdump.sysconfig.s390x
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@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb prot_virt ignition.firstboot"
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb prot_virt ignition.firstboot zfcp.allow_lun_scan"
# This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE