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From: Haicheng Li on 20 May 2010 00:00
Wu Fengguang wrote:
>> @@ -1033,6 +1038,7 @@ vmemmap_populate(struct page *start_page, unsigned long size, int node)
>> }
>>
>> }
>> + sync_global_pgds((unsigned long)start_page, end);
>
> Here you removed the tlb flush in the original patch. Is it safe to do so?

Yes, I think so. Before this populate, such vmemmap mapping should be always zero, so it's optional
to do tlb flush here.

-haicheng
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