134c578463
Usually kdump kernel don't need a swiotlb. There are two cases known common case a swiotlb is needed: - SEV/SME is active. - crashkernel high reservation is used, or there are crashkernel memory above 4G. For both case, if swiotlb is set to a large value in first kernel, kdump kernel will likely to fail with OOM. So don't inherit swiotlb parameter by default. Signed-off-by: Kairui Song <kasong@redhat.com> Acked-by: Pingfan Liu <piliu@redhat.com>
47 lines
1.9 KiB
Plaintext
47 lines
1.9 KiB
Plaintext
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
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# If no version is specified, then the init script will try to find a
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# kdump kernel with the same version number as the running kernel.
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KDUMP_KERNELVER=""
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# The kdump commandline is the command line that needs to be passed off to
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# the kdump kernel. This will likely match the contents of the grub kernel
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# line. For example:
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# KDUMP_COMMANDLINE="ro root=LABEL=/"
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# Dracut depends on proper root= options, so please make sure that appropriate
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# root= options are copied from /proc/cmdline. In general it is best to append
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# command line options using "KDUMP_COMMANDLINE_APPEND=".
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# If a command line is not specified, the default will be taken from
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# /proc/cmdline
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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"
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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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KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 acpi_no_memhotplug transparent_hugepage=never nokaslr hest_disable novmcoredd"
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# Any additional kexec arguments required. In most situations, this should
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# be left empty
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#
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# Example:
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# KEXEC_ARGS="--elf32-core-headers"
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KEXEC_ARGS=""
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#Where to find the boot image
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#KDUMP_BOOTDIR="/boot"
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#What is the image type used for kdump
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KDUMP_IMG="vmlinuz"
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#What is the images extension. Relocatable kernels don't have one
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KDUMP_IMG_EXT=""
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# Using kexec file based syscall by default
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#
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# Here, the "on" is the only valid value to enable the kexec file load and
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# anything else is equal to the "off"(disable).
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KDUMP_FILE_LOAD="on"
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