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ppc64, ppc64le: disable kvm CMA reservation in kdump kernel

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By default on powerpc platform, kvm will reserve a relatively large CMA
(128M aligned) at early boot. In kdump kernel, even KVM sounds useless
but still it reserves 128M and makes kdump kernel fail to boot.

Now fix this by adding the following to kernel command line:

"kvm_cma_resv_ratio=0"

which disable the CMA reservation.

Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
WANG Chao 2014-09-25 12:18:54 +08:00
parent 013bb485b8
commit 7d8e65d615
2 changed files with 2 additions and 2 deletions
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2
kdump.sysconfig.ppc64
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@ -16,7 +16,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# As taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # As taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 noirqdistrib reset_devices cgroup_disable=memory numa=off udev.children-max=2 ehea.use_mcs=0 panic=10 rootflags=nofail" KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 noirqdistrib reset_devices cgroup_disable=memory numa=off udev.children-max=2 ehea.use_mcs=0 panic=10 rootflags=nofail kvm_cma_resv_ratio=0"
# Any additional kexec arguments required. In most situations, this should # Any additional kexec arguments required. In most situations, this should
# be left empty # be left empty

2
kdump.sysconfig.ppc64le
View File

@ -16,7 +16,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us append arguments to the current kdump commandline # This variable lets us append arguments to the current kdump commandline
# As taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline # As taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 noirqdistrib reset_devices cgroup_disable=memory numa=off udev.children-max=2 ehea.use_mcs=0 panic=10 rootflags=nofail" KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 noirqdistrib reset_devices cgroup_disable=memory numa=off udev.children-max=2 ehea.use_mcs=0 panic=10 rootflags=nofail kvm_cma_resv_ratio=0"
# Any additional kexec arguments required. In most situations, this should # Any additional kexec arguments required. In most situations, this should
# be left empty # be left empty