free_area_init

函数名称：Set up the zone data structures:* - mark all pages reserved* - mark all memory queues empty* - clear the memory bitmaps* NOTE: pgdat should get zeroed by caller.* NOTE: this function is only called during early init.

函数原型：static void __init free_area_init_core(struct pglist_data *pgdat)

返回类型：void

参数：

类型	参数	名称
struct pglist_data *	pgdat

6743

zone等于包含了结点中各内存域的数据结构加j

6745

zone_start_pfn等于内存域第一个页帧的索引

6747

size等于内存域中页的总数

6748

freesize等于内存域中实际上可用的页数目

6755

memmap_pages等于calc_memmap_size(size, freesize)

6756

如果非is_highmem_idx(j)则

6757

如果freesize大于等于memmap_pages则

6758

freesize减等于memmap_pages

6759

如果memmap_pages则printk - print a kernel message*@fmt: format string* This is printk(). It can be called from any context. We want it to work.* We try to grab the console_lock. If we succeed, it's easy - we log the* output and call the console drivers

6763

否则打印警告信息(" %s zone: %lu pages exceeds freesize %lu\n", zone_names[j], memmap_pages, freesize)

6769

如果j恒等于0且freesize大于dma_reserve则

6770

freesize减等于dma_reserve

6771

printk - print a kernel message*@fmt: format string* This is printk(). It can be called from any context. We want it to work.* We try to grab the console_lock. If we succeed, it's easy - we log the* output and call the console drivers

6775

如果非is_highmem_idx(j)则nr_kernel_pages加等于freesize

6778

否则如果nr_kernel_pages大于memmap_pages乘2则nr_kernel_pages减等于memmap_pages

6780

nr_all_pages加等于freesize

6787

zone_init_internals(zone, j, nid, freesize)

6789

如果非size则继续下一循环

6792

When CONFIG_HUGETLB_PAGE_SIZE_VARIABLE is not set, set_pageblock_order()* is unused as pageblock_order is set at compile-time. See* include/linux/pageblock-flags.h for the values of pageblock_order based on* the kernel config

6793

setup_usemap(pgdat, zone, zone_start_pfn, size)

6794

init_currently_empty_zone(zone, zone_start_pfn, size)

6795

memmap_init(size, nid, j, zone_start_pfn)

函数逻辑报告