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RE: [Xen-devel] [PATCH] Increasing E820MAX

from [Ian Pratt]

[Permanent Link][Original]

To:	"Nakajima, Jun" <jun.nakajima@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-devel] [PATCH] Increasing E820MAX
From:	"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date:	Wed, 17 Aug 2005 20:10:11 +0100
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Thread-topic:	[Xen-devel] [PATCH] Increasing E820MAX

This breaks x86_64 boot! It crashes in the Xen ACPI code. 

Ian

> We found machines with >32 E820 memory map entries, where Xen 
> fails to boot (but Linux does boot fine). The native Linux 
> (both x86 and x86_86) already has:
> 
> #define E820MAX       128             /* number of entries in 
> E820MAP */
> 
> Signed-off-by: Jun Nakajima <jun.nakajima@xxxxxxxxx>
> 
> Jun
> ---
> Intel Open Source Technology Center 
> 
> --
> diff -r 3bb1857981e6 -r 51e9c0c806b2 xen/include/asm-x86/e820.h
> --- a/xen/include/asm-x86/e820.h      Tue Aug 16 19:38:22 2005
> +++ b/xen/include/asm-x86/e820.h      Wed Aug 17 17:00:29 2005
> @@ -3,7 +3,7 @@
>  
>  #include <asm/page.h>
>  
> -#define E820MAX      32
> +#define E820MAX      128
>  
>  #define E820_RAM          1
>  #define E820_RESERVED     2
> 

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