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page_alloc: make movablemem_map have higher priority

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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: Tang Chen <tangchen@cn.fujitsu.com>
Reviewed-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Wu Jianguo <wujianguo@huawei.com>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Tested-by: Lin 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tang Chen 2013-02-22 16:33:40 -08:00 committed by Linus Torvalds
parent 6981ec3114
commit 42f47e27e7
1 changed files with 25 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

28
mm/page_alloc.c
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@ -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 @@ static void __init find_zone_movable_pfns_for_nodes(void)
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 @@ static void __init find_zone_movable_pfns_for_nodes(void)
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;
}