Re: [Xen-devel] [PATCH] kexec/x86: Do not map crash kernel area

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 09.12.13 at 19:01, Daniel Kiper <daniel.kiper@xxxxxxxxxx> wrote:
> Do not map crash kernel area. This mapping is not in use anymore.

That description to me reads like it was used before. Was it really?
I think the issue of it possibly being outside of mappable memory
has been in existence for quite a while, and hence with the
description being worded in that way this would be a suitable
trigger for backporting to the stable trees.

Jan

> Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
> ---
>  xen/arch/x86/setup.c |    4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
> index f07ee2b..4833ca3 100644
> --- a/xen/arch/x86/setup.c
> +++ b/xen/arch/x86/setup.c
> @@ -1097,9 +1097,7 @@ void __init __start_xen(unsigned long mbi_p)
>                           mod[i].mod_start,
>                           PFN_UP(mod[i].mod_end), PAGE_HYPERVISOR);
>      }
> -    map_pages_to_xen((unsigned long)__va(kexec_crash_area.start),
> -                     kexec_crash_area.start >> PAGE_SHIFT,
> -                     PFN_UP(kexec_crash_area.size), PAGE_HYPERVISOR);
> +
>      xen_virt_end = ((unsigned long)_end + (1UL << L2_PAGETABLE_SHIFT) - 1) &
>                     ~((1UL << L2_PAGETABLE_SHIFT) - 1);
>      destroy_xen_mappings(xen_virt_end, XEN_VIRT_START + 
> BOOTSTRAP_MAP_BASE);
> -- 
> 1.7.10.4




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