函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\page_owner.c Create Date:2022-07-27 17:58:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：init_pages_in_zone

函数原型：static void init_pages_in_zone(pg_data_t *pgdat, struct zone *zone)

返回类型：void

参数：

类型参数名称
pg_data_t *pgdat
struct zone *zone
548  pfn等于内存域第一个页帧的索引
549  end_pfn等于zone_end_pfn(zone)
550  count等于0
557  以pfn小于end_pfn循环
560  如果非pfn_valid(pfn)则
561  pfn等于@a is a power of 2 value (pfn + 1, MAX_ORDER_NR_PAGES)
562  继续下一循环
565  block_end_pfn等于@a is a power of 2 value (pfn + 1, pageblock_nr_pages)
566  block_end_pfn等于两数取小(block_end_pfn, end_pfn)
568  以pfn小于block_end_pfn循环
572  如果非pfn_valid_within(pfn)则继续下一循环
575  page等于pfn_to_page(pfn)
577  如果page_zone(page)不等于zone则继续下一循环
587  如果PageBuddy() indicates that the page is free and in the buddy system* (see mm/page_alloc.c).则
588  order等于Like page_order(), but for callers who cannot afford to hold the zone lock(page)
590  如果order大于0且order小于Free memory management - zoned buddy allocator. 则pfn加等于1UL左移order位的值减1
592  继续下一循环
595  如果PageReserved(page)则继续下一循环
598  page_ext等于lookup_page_ext(page)
599  如果此条件成立可能性小(为编译器优化)(!page_ext)则继续下一循环
603  如果st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则继续下一循环
607  __set_page_owner_handle(page, page_ext, early_handle, 0, 0)
609  count自加
611  cond_resched()
614  打印信息("Node %d, zone %8s: page owner found early allocated %lu pages\n", 全局结点ID, 内存域的惯用名称(NORMAL DMA HIGHMEM), count)
调用者
名称描述
init_zones_in_node