Re: [PATCH] Prevent reserving RAM in the region already reservedby BIOS

From: Yinghai
Date: Wed May 19 2010 - 13:42:31 EST


On 05/18/2010 10:35 PM, Mathieu Rondonneau wrote:
> Does it make sense to prevent looking for stolen RAM below the ISA section.
>
>
> Signed-off-by: Mathieu Rondonneau <mathieu.rondonneau@xxxxxxxxx>
> ---
> arch/x86/kernel/e820.c | 2 ++
> 1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
> index 7bca3c6..322c9c3 100644
> --- a/arch/x86/kernel/e820.c
> +++ b/arch/x86/kernel/e820.c
> @@ -1156,6 +1156,8 @@ void __init e820_reserve_resources_late(void)
> end = MAX_RESOURCE_SIZE;
> if (start >= end)
> continue;
> + if (end < ISA_START_ADDRESS)
> + continue;
> printk(KERN_DEBUG "reserve RAM buffer: %016llx - %016llx ",
> start, end);
> reserve_region_with_split(&iomem_resource, start, end,

do you notice any changes in /proc/iomem?

YH
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