Re: [PATCH] x86: make sure wakeup code is below 1M -v2

[H. Peter Anvin]

On 11/11/2009 11:14 PM, ykzhao wrote:
> 
> In this patch the find_e820_area is used in the
> acpi_reserve_wakeup_memory, which is called after initializing the
> bootmem allocator.
> Can we still use the find_e820_area after the bootmem allocator is
> initialized? 

Obviously not: the bootmem allocator now thinks it owns memory, and it
wouldn't know not to allocate something that is later claimed by
find_e820_area.  Problem.

> It seems that the bootmem bitmap is also found by using the
> find_e820_area. But we don't update the reserved_early array any more.
> Maybe we will get the overlap address with the bootmem bitmap for the
> wakeup code.

Not just the bitmap, but any bootmem allocation could conflict...

	-hpa
-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

--
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/