[PATCH 1/3] kexec: don't invoke OOM-killer for control page allocation

[Baoquan He]

On 04/14/16 at 09:00pm, Russell King wrote:
> If we are unable to find a suitable page when allocating the control
> page, do not invoke the OOM-killer: killing processes probably isn't
> going to help.

Originally kexec was made to reboot to test kernel quickly. If 1st
kernel is palyed and hurted in a bad state and developer want to discard
it and take a quick reboot, why don't we have a best try to make a
successful kexec load?

I personally think this change sounds un-reasonable.

> 
> Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
> ---
>  include/linux/kexec.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/linux/kexec.h b/include/linux/kexec.h
> index 2cc643c6e870..1b32ab587f66 100644
> --- a/include/linux/kexec.h
> +++ b/include/linux/kexec.h
> @@ -41,7 +41,7 @@
>  #endif
>  
>  #ifndef KEXEC_CONTROL_MEMORY_GFP
> -#define KEXEC_CONTROL_MEMORY_GFP GFP_KERNEL
> +#define KEXEC_CONTROL_MEMORY_GFP (GFP_KERNEL | __GFP_NORETRY)
>  #endif
>  
>  #ifndef KEXEC_CONTROL_PAGE_SIZE
> -- 
> 2.1.0
> 
> 
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