sysconfig: add zfcp.allow_lun_scan to KDUMP_COMMANDLINE_REMOVE on s390
Resolves: bz2177674 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>
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@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
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# This variable lets us remove arguments from the current kdump commandline
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# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
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# NOTE: some arguments such as crashkernel will always be removed
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KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb vmcp_cma cma hugetlb_cma prot_virt ignition.firstboot"
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KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb vmcp_cma cma hugetlb_cma prot_virt ignition.firstboot zfcp.allow_lun_scan"
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# This variable lets us append arguments to the current kdump commandline
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# after processed by KDUMP_COMMANDLINE_REMOVE
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