linux-kernel - Re: [PATCH] kexec/kdump: Minor Documentation updates for arm64 and Image

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Date:   Thu, 18 May 2017 13:59:14 +0800
From:   Dave Young <dyoung@...hat.com>
To:     Bharat Bhushan <Bharat.Bhushan@....com>
Cc:     bhe@...hat.com, vgoyal@...hat.com, corbet@....net,
        kexec@...ts.infradead.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, takahiro.akashi@...aro.org,
        panand@...hat.com
Subject: Re: [PATCH] kexec/kdump: Minor Documentation updates for arm64 and
 Image

Add Takahiro and Pratyush, they should be able to review the arm64 part.

On 05/18/17 at 11:03am, Bharat Bhushan wrote:
> This patch have minor updates in Documentation for arm64i as
> relocatable kernel.
> Also this patch updates documentation for using uncompressed
> image "Image" which is used for ARM64.
> 
> Signed-off-by: Bharat Bhushan <Bharat.Bhushan@....com>
> ---
>  Documentation/kdump/kdump.txt | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
> index 615434d..522ce13 100644
> --- a/Documentation/kdump/kdump.txt
> +++ b/Documentation/kdump/kdump.txt
> @@ -112,8 +112,8 @@ There are two possible methods of using Kdump.
>  2) Or use the system kernel binary itself as dump-capture kernel and there is
>     no need to build a separate dump-capture kernel. This is possible
>     only with the architectures which support a relocatable kernel. As
> -   of today, i386, x86_64, ppc64, ia64 and arm architectures support relocatable
> -   kernel.
> +   of today, i386, x86_64, ppc64, ia64, arm and arm64 architectures support
> +   relocatable kernel.
>  
>  Building a relocatable kernel is advantageous from the point of view that
>  one does not have to build a second kernel for capturing the dump. But
> @@ -361,6 +361,12 @@ to load dump-capture kernel.
>     --dtb=<dtb-for-dump-capture-kernel> \
>     --append="root=<root-dev> <arch-specific-options>"
>  
> +If you are using a uncompressed Image, then use following command

s/a/an

> +to load dump-capture kernel.
> +
> +   kexec -p <dump-capture-kernel-Image> \
> +   --initrd=<initrd-for-dump-capture-kernel> \
> +   --append="root=<root-dev> <arch-specific-options>"

For uncompressed Image, dtb is not necessary?

>  
>  Please note, that --args-linux does not need to be specified for ia64.
>  It is planned to make this a no-op on that architecture, but for now
> -- 
> 1.9.3
> 

Thanks
Dave