Messages in this thread | | | Date | Fri, 16 Dec 2011 12:59:38 -0800 | Subject | Re: [PATCH 1/1] x86: Exclude E820_RESERVED regions and memory holes above 4 GB from direct mapping. | From | Yinghai Lu <> |
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On Fri, Dec 16, 2011 at 10:32 AM, H. Peter Anvin <hpa@zytor.com> wrote: > > Well, there are two options for memory hotplug: either we always leave > address space that can be used for memory hotplug mapped at all times, or we > need to track it anyway. Either way we need to know where there regions > are. Am I correct that right now we always map memory hotpluggable regions, > being below the top pfn?
in arch/x86/mm/init_64.c::arch_add_memory() it will call init_memory_mapping to map new added memory. and will update max_pfn_mapped, max-pfn, max_low_pfn.
Thanks
Yinghai Lu -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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