[PATCH 2/2] aarch64/kdump.sysconfig: Make config options similar to x86_64
Looking at the difference of the x86_64 and aarch64 kdump.sysconfig
options for Fedora, one can see the following options which are
different:
Present in kdump.sysconfig.x86_64 but not in kdump.sysconfig.aarch64:
---------------------------------------------------------------------
cgroup_disable=memory
mce=off
numa=off
udev.children-max=2
panic=10
acpi_no_memhotplug
transparent_hugepage=never
nokaslr
Present in kdump.sysconfig.aarch64 but not in kdump.sysconfig.x86_64:
---------------------------------------------------------------------
swiotlb=noforce
After going through all the options, it makes sense to add the
following options added to kdump.sysconfig.aarch64:
KDUMP_COMMANDLINE_APPEND="cgroup_disable=memory udev.children-max=2
panic=10 irqpoll nr_cpus=1
swiotlb=noforce reset_devices"
This has helped reduce the memory footprint of crashkernel on several
aarch64 machines available in the beaker lab. For e.g. I was seeing
OOM issues on large aws ec2 instances with the default crashkernel size
of 512M, and I had to use an increased crashkernel size of 786M on the
same to boot the crash dump kernel.
Signed-off-by: Bhupesh Sharma <bhsharma(a)redhat.com>
---
kdump.sysconfig.aarch64 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kdump.sysconfig.aarch64 b/kdump.sysconfig.aarch64
index 0a6b14c8bd37..c72a0406fa01 100644
--- a/kdump.sysconfig.aarch64
+++ b/kdump.sysconfig.aarch64
@@ -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 swiotlb=noforce reset_devices"
+KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory
udev.children-max=2 panic=10 swiotlb=noforce"
# Any additional kexec arguments required. In most situations, this should
# be left empty
--
2.7.4