On Tue, 20 Apr 2010, Mel Gorman wrote:
> @@ -520,10 +521,12 @@ static int move_to_new_page(struct page *newpage, struct page *page)
> else
> rc = fallback_migrate_page(mapping, newpage, page);
>
> - if (!rc)
> - remove_migration_ptes(page, newpage);
> - else
> + if (rc) {
> newpage->mapping = NULL;
> + } else {
> + if (remap_swapcache)
> + remove_migration_ptes(page, newpage);
> + }
You are going to keep the migration ptes after the page has been unlocked?
Or is remap_swapcache true if its not a swapcache page?
Maybe you meant
if (!remap_swapcache)
?
> unlock_page(newpage);
>
>
> skip_unmap:
> if (!page_mapped(page))
> - rc = move_to_new_page(newpage, page);
> + rc = move_to_new_page(newpage, page, remap_swapcache);
>
> - if (rc)
> + if (rc && remap_swapcache)
> remove_migration_ptes(page, page);
> rcu_unlock:
>
Looks like you meant !remap_swapcache
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