ARM64 kexec/kdump timeline

[Timur Tabi]

On Mon, Jun 1, 2015 at 1:25 AM, Pratyush Anand <panand at redhat.com> wrote:

> We had seen a failure with check_cpu_nodes(), when booting with ACPI without
> any DTB.
>
> If you see the similar failure, then can you pl try following:
>
> diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
> index 7b219097dfff..8e085212d8a5 100644
> --- a/kexec/arch/arm64/kexec-arm64.c
> +++ b/kexec/arch/arm64/kexec-arm64.c
> @@ -640,7 +640,7 @@ int arm64_load_other_segments(struct kexec_info *info,
>         result =  check_cpu_nodes(&dtb_1, &dtb_2);
>
>         if (result)
> -               return result;
> +               fprintf(stderr, "kexec: Warning: No device tree
> available.\n");
>
>         /*
>          * Put the DTB after the kernel with an alignment of 128 KiB, giving

I finally got around to testing this.  With this change, the tool just
displays the error message and continues working.  So +1 for this
patch.

It would be better, of course, if the tool could parse the ACPI tables
and generate a compatible device tree with CPU nodes.  Do you have any
plans to support ACPI with this tool?  We're working on that
internally, but it's mostly hacks and work-arounds for now.

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