Commit 42f47e27 authored by Tang Chen's avatar Tang Chen Committed by Linus Torvalds
Browse files

page_alloc: make movablemem_map have higher priority 



If kernelcore or movablecore is specified at the same time with
movablemem_map, movablemem_map will have higher priority to be
satisfied.  This patch will make find_zone_movable_pfns_for_nodes()
calculate zone_movable_pfn[] with the limit from zone_movable_limit[].

Signed-off-by: default avatarTang Chen <tangchen@cn.fujitsu.com>
Reviewed-by: default avatarWen Congyang <wency@cn.fujitsu.com>
Cc: Wu Jianguo <wujianguo@huawei.com>
Reviewed-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
Tested-by: default avatarLin Feng <linfeng@cn.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6981ec31

mm/page_alloc.c

+25 −3
Original line number Diff line number Diff line
@@ -4905,9 +4905,17 @@ static void __init find_zone_movable_pfns_for_nodes(void) 
		required_kernelcore = max(required_kernelcore, corepages);

	}



	/* If kernelcore was not specified, there is no ZONE_MOVABLE */

	if (!required_kernelcore)

	/*

	 * If neither kernelcore/movablecore nor movablemem_map is specified,

	 * there is no ZONE_MOVABLE. But if movablemem_map is specified, the

	 * start pfn of ZONE_MOVABLE has been stored in zone_movable_limit[].

	 */

	if (!required_kernelcore) {

		if (movablemem_map.nr_map)

			memcpy(zone_movable_pfn, zone_movable_limit,

				sizeof(zone_movable_pfn));

		goto out;

	}



	/* usable_startpfn is the lowest possible pfn ZONE_MOVABLE can be at */

	usable_startpfn = arch_zone_lowest_possible_pfn[movable_zone];
@@ -4937,10 +4945,24 @@ restart: 
		for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {

			unsigned long size_pages;



			/*

			 * Find more memory for kernelcore in

			 * [zone_movable_pfn[nid], zone_movable_limit[nid]).

			 */

			start_pfn = max(start_pfn, zone_movable_pfn[nid]);

			if (start_pfn >= end_pfn)

				continue;



			if (zone_movable_limit[nid]) {

				end_pfn = min(end_pfn, zone_movable_limit[nid]);

				/* No range left for kernelcore in this node */

				if (start_pfn >= end_pfn) {

					zone_movable_pfn[nid] =

							zone_movable_limit[nid];

					break;

				}

			}



			/* Account for what is only usable for kernelcore */

			if (start_pfn < usable_startpfn) {

				unsigned long kernel_pages;
@@ -5000,12 +5022,12 @@ restart: 
	if (usable_nodes && required_kernelcore > usable_nodes)

		goto restart;



out:

	/* Align start of ZONE_MOVABLE on all nids to MAX_ORDER_NR_PAGES */

	for (nid = 0; nid < MAX_NUMNODES; nid++)

		zone_movable_pfn[nid] =

			roundup(zone_movable_pfn[nid], MAX_ORDER_NR_PAGES);



out:

	/* restore the node_state */

	node_states[N_MEMORY] = saved_node_state;

}

CRA Git | Maintained and supported by SUSTech CRA and CCSE