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Subject[PATCH] x86: use add_highpages_with_active_regions for high pages init
Date

use early_node_map to init high pages, so can remove page_is_ram and
page_is_reserved_early in the big loop with add_one_highpage

also remove the page_is_reserved_early that is not needed.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 4f2cd5d..a87843b 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -612,17 +612,6 @@ void __init free_early(u64 start, u64 end)
early_res[j - 1].end = 0;
}

-int __init page_is_reserved_early(unsigned long pagenr)
-{
- u64 start = (u64)pagenr << PAGE_SHIFT;
- int i;
- struct early_res *r;
-
- i = find_overlapped_early(start, start + PAGE_SIZE);
- r = &early_res[i];
- return (i < MAX_EARLY_RES && r->end);
-}
-
void __init early_res_to_bootmem(u64 start, u64 end)
{
int i;
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/discontig_32.c
index c6ce6a5..5444be2 100644
--- a/arch/x86/mm/discontig_32.c
+++ b/arch/x86/mm/discontig_32.c
@@ -100,7 +100,6 @@ unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
#endif

extern unsigned long find_max_low_pfn(void);
-extern void add_one_highpage_init(struct page *, int, int);
extern unsigned long highend_pfn, highstart_pfn;

#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
@@ -407,10 +406,10 @@ void __init set_highmem_pages_init(int bad_ppro)
{
#ifdef CONFIG_HIGHMEM
struct zone *zone;
- struct page *page;
+ int nid;

for_each_zone(zone) {
- unsigned long node_pfn, zone_start_pfn, zone_end_pfn;
+ unsigned long zone_start_pfn, zone_end_pfn;

if (!is_highmem(zone))
continue;
@@ -418,16 +417,12 @@ void __init set_highmem_pages_init(int bad_ppro)
zone_start_pfn = zone->zone_start_pfn;
zone_end_pfn = zone_start_pfn + zone->spanned_pages;

+ nid = zone_to_nid(zone);
printk("Initializing %s for node %d (%08lx:%08lx)\n",
- zone->name, zone_to_nid(zone),
- zone_start_pfn, zone_end_pfn);
-
- for (node_pfn = zone_start_pfn; node_pfn < zone_end_pfn; node_pfn++) {
- if (!pfn_valid(node_pfn))
- continue;
- page = pfn_to_page(node_pfn);
- add_one_highpage_init(page, node_pfn, bad_ppro);
- }
+ zone->name, nid, zone_start_pfn, zone_end_pfn);
+
+ add_highpages_with_active_regions(nid, zone_start_pfn,
+ zone_end_pfn, bad_ppro);
}
totalram_pages += totalhigh_pages;
#endif
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 4f308fa..502b2a9 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -294,8 +294,7 @@ static void __init permanent_kmaps_init(pgd_t *pgd_base)

void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
{
- if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn)) &&
- !page_is_reserved_early(pfn)) {
+ if (!(bad_ppro && page_kills_ppro(pfn))) {
ClearPageReserved(page);
init_page_count(page);
__free_page(page);
@@ -307,15 +306,9 @@ void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
#ifndef CONFIG_NUMA
static void __init set_highmem_pages_init(int bad_ppro)
{
- int pfn;
+ add_highpages_with_active_regions(0, highstart_pfn, highend_pfn,
+ bad_ppro);

- for (pfn = highstart_pfn; pfn < highend_pfn; pfn++) {
- /*
- * Holes under sparsemem might not have no mem_map[]:
- */
- if (pfn_valid(pfn))
- add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
- }
totalram_pages += totalhigh_pages;
}
#endif /* !CONFIG_NUMA */
diff --git a/include/asm-x86/e820.h b/include/asm-x86/e820.h
index a5959e3..b336666 100644
--- a/include/asm-x86/e820.h
+++ b/include/asm-x86/e820.h
@@ -86,7 +86,6 @@ extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
extern void reserve_early(u64 start, u64 end, char *name);
extern void free_early(u64 start, u64 end);
extern void early_res_to_bootmem(u64 start, u64 end);
-extern int page_is_reserved_early(unsigned long pagenr);
extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);

extern unsigned long e820_end_of_ram(void);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 77b5ec6..df4c0fa 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1010,6 +1010,8 @@ extern unsigned long find_min_pfn_with_active_regions(void);
extern unsigned long find_max_pfn_with_active_regions(void);
extern void free_bootmem_with_active_regions(int nid,
unsigned long max_low_pfn);
+extern void add_highpages_with_active_regions(int nid, unsigned long start_pfn,
+ unsigned long end_pfn, int bad_ppro);
extern void sparse_memory_present_with_active_regions(int nid);
#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
extern int early_pfn_to_nid(unsigned long pfn);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 17ef776..5cd82a6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2939,6 +2939,30 @@ void __init free_bootmem_with_active_regions(int nid,
}
}

+extern void add_one_highpage_init(struct page *, int, int);
+void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
+ unsigned long end_pfn, int bad_ppro)
+{
+ int i;
+ int node_pfn;
+ struct page *page;
+ unsigned long final_start_pfn, final_end_pfn;
+
+ for_each_active_range_index_in_nid(i, nid){
+ final_start_pfn = max(start_pfn, early_node_map[i].start_pfn);
+ final_end_pfn = min(end_pfn, early_node_map[i].end_pfn);
+ if (final_start_pfn >= final_end_pfn)
+ continue;
+
+ for (node_pfn = final_start_pfn; node_pfn < final_end_pfn;
+ node_pfn++) {
+ if (!pfn_valid(node_pfn))
+ continue;
+ page = pfn_to_page(node_pfn);
+ add_one_highpage_init(page, node_pfn, bad_ppro);
+ }
+ }
+}
/**
* sparse_memory_present_with_active_regions - Call memory_present for each active range
* @nid: The node to call memory_present for. If MAX_NUMNODES, all nodes will be used.

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