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kdump.sysconfig/x86_64: Disable HEST by default

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Some firmware will provide a ACPI HEST table with massive amount of
entries, and the way how kernel handles these entries will consume a lot
of memory which will lead to OOM issue in kdump kernel. During testing
on certain machine, disable HEST saved ~60M of memory.

Kdump is only for emergency use in case of a kernel panic, so temporarily
disable hardware error report & recovery related feature is acceptable
in general. So disable HEST support in kdump kernel to save memory.

Currently such issue is only observed on x86_64, so limit this change to
x86_64 only.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This commit is contained in:
Kairui Song 2019-07-01 19:48:13 +08:00
parent ace23737ab
commit b998b90197
1 changed files with 1 additions and 1 deletions
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kdump.sysconfig.x86_64
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@ -21,7 +21,7 @@ KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet"
# This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE
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"
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"
# Any additional kexec arguments required. In most situations, this should
# be left empty