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Add acpi_no_memhotplug to kdump kernel

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In kdump kernel boot, kdump kernel is booted with memmap= and add
them into e820 map. Then ACPI is initialized and the kernel traverses
the ACPI namespace to find entries for memory device to be hot added.
This adds page table information and the kexec/kdump kernel runs out
of memory.

So in kdump kernel, hot plug memory need be disabled always, only
exact map is trusted. Now add the kernel parameter acpi_no_memhotplug
to kdump kernel cmdline.

Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
Baoquan He 2014-01-26 17:22:33 +08:00 committed by WANG Chao
parent 11cb815904
commit 1065b91f7d
1 changed files with 1 additions and 1 deletions
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kdump.sysconfig.x86_64
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@ -16,7 +16,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us append arguments to the current kdump commandline
# As taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail"
KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug"
# Any additional kexec arguments required. In most situations, this should
# be left empty