linux-4.4.1/page_order() の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-4.4.1/page_order() へ行く。
  • 1 (2017-09-21 (木) 11:18:20)

参照元†

• linux-4.4.1/PageBuddy()
• linux-4.4.1/__SetPageBuddy()
• linux-4.4.1/__test_page_isolated_in_pageblock()
• linux-4.4.1/set_page_order()

説明†

• パス: linux-4.4.1/mm/internal.h

• FIXME: これは何？
  • 説明

引数†

• struct page *page
  • linux-4.4.1/page

返り値†

• unsigned int

参考†

実装†

/*
 * This function returns the order of a free page in the buddy system. In
 * general, page_zone(page)->lock must be held by the caller to prevent the
 * page from being allocated in parallel and returning garbage as the order.
 * If a caller does not hold page_zone(page)->lock, it must guarantee that the
 * page cannot be allocated or merged in parallel. Alternatively, it must
 * handle invalid values gracefully, and use page_order_unsafe() below.
 */
static inline unsigned int page_order(struct page *page)
{
	/* PageBuddy() must be checked by the caller */
	return page_private(page);

• • linux-4.4.1/page_private()

}

コメント†