Re: [PATCH 2/2] x86, mem-hotplug: update all PGDs for direct mappingand vmemmap mapping changes on 64bit.

From: Haicheng Li
Date: Wed May 19 2010 - 23:52:20 EST

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.

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