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 --- kdump.sysconfig.ppc64 | 2 +- kdump.sysconfig.ppc64le | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kdump.sysconfig.ppc64 b/kdump.sysconfig.ppc64 index ca7e1d8..923aa26 100644 --- a/kdump.sysconfig.ppc64 +++ b/kdump.sysconfig.ppc64 @@ -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 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 # be left empty diff --git a/kdump.sysconfig.ppc64le b/kdump.sysconfig.ppc64le index ca7e1d8..923aa26 100644 --- a/kdump.sysconfig.ppc64le +++ b/kdump.sysconfig.ppc64le @@ -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 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 # be left empty
On Thu, Sep 25, 2014 at 12:28:55PM +0800, WANG Chao wrote:
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
Thanks Vivek
kdump.sysconfig.ppc64 | 2 +- kdump.sysconfig.ppc64le | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kdump.sysconfig.ppc64 b/kdump.sysconfig.ppc64 index ca7e1d8..923aa26 100644 --- a/kdump.sysconfig.ppc64 +++ b/kdump.sysconfig.ppc64 @@ -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 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 # be left empty diff --git a/kdump.sysconfig.ppc64le b/kdump.sysconfig.ppc64le index ca7e1d8..923aa26 100644 --- a/kdump.sysconfig.ppc64le +++ b/kdump.sysconfig.ppc64le @@ -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 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
# be left empty
1.9.3
-
Vivek Goyal -
WANG Chao