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#author("2025-09-13T01:35:25+09:00","default:guest","guest") #author("2025-09-13T01:36:49+09:00","default:guest","guest") *参照元 [#aff2b156] #backlinks *説明 [#kcf67e76] -パス: [[linux-5.15/mm/page_alloc.c]] -FIXME: これは何？ --説明 **引数 [#c24b9195] - -struct zone *zone -- --[[linux-5.15/zone]] -unsigned int order -- -int migratetype -- -unsigned int alloc_flags -- -struct per_cpu_pages *pcp -- --[[linux-5.15/per_cpu_pages]] -struct list_head *list -- --[[linux-5.15/list_head]] **返り値 [#tc1d50a3] - -struct page * -- --[[linux-5.15/page]] **参考 [#l601bc98] *実装 [#ga564ae3] /* Remove page from the per-cpu list, caller must protect the list */ static inline struct page *__rmqueue_pcplist(struct zone *zone, unsigned int order, int migratetype, unsigned int alloc_flags, struct per_cpu_pages *pcp, struct list_head *list) { struct page *page; do { if (list_empty(list)) { int batch = READ_ONCE(pcp->batch); int alloced; - --[[linux-5.15/page]] --[[linux-5.15/list_empty()]] --[[linux-5.15/READ_ONCE()]] /* * Scale batch relative to order if batch implies * free pages can be stored on the PCP. Batch can * be 1 for small zones or for boot pagesets which * should never store free pages as the pages may * belong to arbitrary zones. */ if (batch > 1) batch = max(batch >> order, 2); alloced = rmqueue_bulk(zone, order, batch, list, migratetype, alloc_flags); pcp->count += alloced << order; if (unlikely(list_empty(list))) return NULL; } - --[[linux-5.15/rmqueue_bulk()]] --[[linux-5.15/unlikely()]] --[[linux-5.15/list_empty()]] page = list_first_entry(list, struct page, lru); list_del(&page->lru); pcp->count -= 1 << order; } while (check_new_pcp(page)); return page; } - --[[linux-5.15/list_first_entry()]] --[[linux-5.15/list_del()]] --[[linux-5.15/check_new_pcp()]] *コメント [#h187e972]
