linux-5.15/__rmqueue() 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-5.15/__rmqueue() へ行く。
  • 1 (2025-09-13 (土) 02:00:27)

参照元†

• linux-4.4.1/__rmqueue()
• linux-5.15/rmqueue()
• linux-5.15/rmqueue_bulk()

説明†

• パス: linux-5.15/mm/page_alloc.c

• FIXME: これは何？
  • 説明

引数†

• struct zone *zone
  • linux-5.15/zone
• unsigned int order
• int migratetype
• unsigned int alloc_flags

返り値†

• struct page *
  • linux-5.15/page

参考†

実装†

/*
 * Do the hard work of removing an element from the buddy allocator.
 * Call me with the zone->lock already held.
 */
static __always_inline struct page *
__rmqueue(struct zone *zone, unsigned int order, int migratetype,
						unsigned int alloc_flags)
{
	struct page *page;

	if (IS_ENABLED(CONFIG_CMA)) {
		/*
		 * Balance movable allocations between regular and CMA areas by
		 * allocating from CMA when over half of the zone's free memory
		 * is in the CMA area.
		 */
		if (alloc_flags & ALLOC_CMA &&
		    zone_page_state(zone, NR_FREE_CMA_PAGES) >
		    zone_page_state(zone, NR_FREE_PAGES) / 2) {
			page = __rmqueue_cma_fallback(zone, order);
			if (page)
				goto out;
		}
	}

• • linux-5.15/IS_ENABLED()
  • linux-5.15/zone_page_state()
  • linux-5.15/__rmqueue_cmd_fallback()

retry:
	page = __rmqueue_smallest(zone, order, migratetype);
	if (unlikely(!page)) {
		if (alloc_flags & ALLOC_CMA)
			page = __rmqueue_cma_fallback(zone, order);

		if (!page && __rmqueue_fallback(zone, order, migratetype,
								alloc_flags))
			goto retry;
	}

• • linux-5.15/__rmqueue_smallest()
  • linux-5.15/unlikely()
  • linux-5.15/__rmqueue_cma_fallback()
  • linux-5.15/__rmqueue_fallback()

out:
	if (page)
		trace_mm_page_alloc_zone_locked(page, order, migratetype);
	return page;
}

• • linux-5.15/trace_mm_page_alloc_zone_locked()

コメント†