Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-bit

[H. Peter Anvin]

Alexander van Heukelum wrote:
> My first guess is that the BIOS data area is completely non-existent for
> Xen.
> Is it guaranteed that the memory is zeroed out on boot? In that case we
> can
> special-case it easily:
>
> change:
>         /* Paranoia: should never happen, but... */
>         if (lowmem >= 0x100000)
>                 lowmem = 0xa0000;
>
> into:
>         /* Strange case, like Xen ;) */
>         if (lowmem == 0 || lowmem >= 0x100000)
>                 lowmem = 0x9f000;
>
> Can you test that?

The EBDA is optional anyway; I presume it should have a zero pointer if 
it isn't present.

	-hpa
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/