[PATCH] kdump.sysconfig.x86_64: Disable HEST by default
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 temproraly
disable hardware error report & recovery related function is accetable
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 for now.
Signed-off-by: Kairui Song <kasong(a)redhat.com>
---
kdump.sysconfig.x86_64 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kdump.sysconfig.x86_64 b/kdump.sysconfig.x86_64
index 4a5ec1c..17ae5e6 100644
--- a/kdump.sysconfig.x86_64
+++ b/kdump.sysconfig.x86_64
@@ -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
--
2.21.0