[PATCH] Add acpi_no_memhotplug to kdump kernel

[WANG Chao]

On 01/26/14 at 05:22pm, Baoquan He wrote:
> 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.

Does anybody know if Fedora has merged the kernel patch?

> 
> Signed-off-by: Baoquan He <bhe at 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 7e4d611..989c3c7 100644
> --- a/kdump.sysconfig.x86_64
> +++ b/kdump.sysconfig.x86_64
> @@ -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
> -- 
> 1.8.3.1
> 
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