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>>>> - __ClearPageMovable(page); >>>> - set_page_private(page, 0); >>>> - /* >>>> - * No touch page.lru field once @page has been isolated >>>> - * because VM is using the field. >>>> - */ >>>> - if (!PageIsolated(page)) >>>> - list_del(&page->lru); >>> >>> I don't see this check elsewhere, is it because, as per the 1/xx of this series, >>> because by the time we do the finalize >> >> balloon_page_delete() was used on two paths >> >> 1) Removing a page from the balloon for deflation through >> balloon_page_list_dequeue() >> >> 2) Removing an isolated page from the balloon for migration in the >> per-driver migration handlers. Isolated pages were already removed from the >> balloon list during ... isolation. >> >> With this change, 1) does the list_del(&page->lru) manually and 2) only >> calls balloon_page_finalize(). >> >> During 1) the same reasoning as in 1/xx applies: isolated pages cannot be in >> the balloon list. > > Right yeah this is what I thought, thanks! I'll add some of that to the patch description! -- Cheers, David / dhildenb