On Wed, 2004-06-30 at 04:17, IWAMOTO Toshihiro wrote:

Due to struct page changes, page->mapping == NULL predicate can no
longer be used for detecting cancellation of an anonymous page
remapping operation.  So the PG_again bit is being used again.
It may be still possible to kill the PG_again bit, but the priority is
rather low.

But, you reintroduced it everywhere, including file-backed pages, not
just for anonymous pages?  Why was this necessary?

-- Dave

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