On Wed, 27 Jun 2012, Yasuaki Ishimatsu wrote:
> Index: linux-3.5-rc4/mm/memory_hotplug.c
> ===================================================================
> --- linux-3.5-rc4.orig/mm/memory_hotplug.c 2012-06-26 13:28:16.743211538
> +0900
> +++ linux-3.5-rc4/mm/memory_hotplug.c 2012-06-26 13:48:38.264940468 +0900
> @@ -887,6 +887,11 @@ static int __ref offline_pages(unsigned
>
> lock_memory_hotplug();
>
> + if (memory_is_offline(start_pfn, end_pfn)) {
> + ret = 0;
> + goto out;
> + }
> +
> zone = page_zone(pfn_to_page(start_pfn));
> node = zone_to_nid(zone);
> nr_pages = end_pfn - start_pfn;
Are there additional prerequisites for this patch? Otherwise it changes
the return value of offline_memory() which will now call
acpi_memory_powerdown_device() in the acpi memhotplug case when disabling.
Is that a problem?
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