free_area_init

Name: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.

Proto:static void __init free_area_init_core(struct pglist_data *pgdat)

Type:void

Parameter:

Type	Parameter	Name
struct pglist_data *	pgdat

6743

zone = node_zones + j

6745

zone_start_pfn = zone_start_pfn == zone_start_paddr >> PAGE_SHIFT

6747

size = spanned_pages

6748

freesize = present_pages

6755

memmap_pages = calc_memmap_size(size, freesize)

6756

If Not is_highmem_idx(j) Then

6757

If freesize >= memmap_pages Then

6758

freesize -= memmap_pages

6759

If memmap_pages Then 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

Else pr_warn(" %s zone: %lu pages exceeds freesize %lu\n", zone_names[j], memmap_pages, freesize)

6769

If j == 0 && freesize > dma_reserve Then

6770

freesize -= 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

If Not is_highmem_idx(j) Then nr_kernel_pages += freesize

6778

Else if nr_kernel_pages > memmap_pages * 2 Then nr_kernel_pages -= memmap_pages

6780

nr_all_pages += freesize

6787

zone_init_internals(zone, j, nid, freesize)

6789

If Not size Then Continue

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)

Function report