Re: [PATCH] PageCompound avoid page[1].mapping

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William Lee Irwin III wrote:
On Fri, Dec 09, 2005 at 09:56:42PM +0000, Hugh Dickins wrote:

-	page[1].mapping = (void *)free_huge_page;
+	page[1].index = (unsigned long)free_huge_page;	/* set dtor */
	for (i = 0; i < (HPAGE_SIZE/PAGE_SIZE); ++i)
		clear_highpage(&page[i]);
	return page;


Hmm, ->lru would be nicer. What prompted the use of ->index?


Yes, agreed. That would rid you of __page_count() too.

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