| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <200806141832.53668.yhlu.kernel@gmail.com>
Date: Sat, 14 Jun 2008 18:32:52 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Andrew Morton <akpm@...ux-foundation.org>,
Ying Huang <ying.huang@...el.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: use add_highpages_with_active_regions for high pages init v2
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.
v2: fix other platform compiling
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
Index: linux-2.6/arch/x86/kernel/e820.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/e820.c
+++ linux-2.6/arch/x86/kernel/e820.c
@@ -612,17 +612,6 @@ void __init free_early(u64 start, u64 en
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;
Index: linux-2.6/arch/x86/mm/discontig_32.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/discontig_32.c
+++ linux-2.6/arch/x86/mm/discontig_32.c
@@ -100,7 +100,6 @@ unsigned long node_memmap_size_bytes(int
#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)
@@ -410,10 +409,10 @@ void __init set_highmem_pages_init(int b
{
#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;
@@ -421,16 +420,12 @@ void __init set_highmem_pages_init(int b
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);
+ zone->name, nid, 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);
- }
+ add_highpages_with_active_regions(nid, zone_start_pfn,
+ zone_end_pfn, bad_ppro);
}
totalram_pages += totalhigh_pages;
#endif
Index: linux-2.6/arch/x86/mm/init_32.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/init_32.c
+++ linux-2.6/arch/x86/mm/init_32.c
@@ -292,10 +292,10 @@ static void __init permanent_kmaps_init(
pkmap_page_table = pte;
}
-void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
+static 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);
@@ -304,18 +304,58 @@ void __init add_one_highpage_init(struct
SetPageReserved(page);
}
+struct add_highpages_data {
+ unsigned long start_pfn;
+ unsigned long end_pfn;
+ int bad_ppro;
+};
+
+static void __init add_highpages_work_fn(unsigned long start_pfn,
+ unsigned long end_pfn, void *datax)
+{
+ int node_pfn;
+ struct page *page;
+ unsigned long final_start_pfn, final_end_pfn;
+ struct add_highpages_data *data;
+ int bad_ppro;
+
+ data = (struct add_highpages_data *)datax;
+ bad_ppro = data->bad_ppro;
+
+ final_start_pfn = max(start_pfn, data->start_pfn);
+ final_end_pfn = min(end_pfn, data->end_pfn);
+ if (final_start_pfn >= final_end_pfn)
+ return;
+
+ 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);
+ }
+
+}
+
+void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
+ unsigned long end_pfn,
+ int bad_ppro)
+{
+ struct add_highpages_data data;
+
+ data.start_pfn = start_pfn;
+ data.end_pfn = end_pfn;
+ data.bad_ppro = bad_ppro;
+
+ work_with_active_regions(nid, add_highpages_work_fn, &data);
+}
+
#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 */
Index: linux-2.6/include/asm-x86/e820.h
===================================================================
--- linux-2.6.orig/include/asm-x86/e820.h
+++ linux-2.6/include/asm-x86/e820.h
@@ -86,7 +86,6 @@ extern u64 find_e820_area_size(u64 start
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);
Index: linux-2.6/include/asm-x86/highmem.h
===================================================================
--- linux-2.6.orig/include/asm-x86/highmem.h
+++ linux-2.6/include/asm-x86/highmem.h
@@ -74,6 +74,9 @@ struct page *kmap_atomic_to_page(void *p
#define flush_cache_kmaps() do { } while (0)
+extern void add_highpages_with_active_regions(int nid, unsigned long start_pfn,
+ unsigned long end_pfn, int bad_ppro);
+
#endif /* __KERNEL__ */
#endif /* _ASM_HIGHMEM_H */
Index: linux-2.6/include/linux/mm.h
===================================================================
--- linux-2.6.orig/include/linux/mm.h
+++ linux-2.6/include/linux/mm.h
@@ -1011,6 +1011,8 @@ extern unsigned long find_min_pfn_with_a
extern unsigned long find_max_pfn_with_active_regions(void);
extern void free_bootmem_with_active_regions(int nid,
unsigned long max_low_pfn);
+typedef void (*work_fn_t)(unsigned long, unsigned long, void *);
+extern void work_with_active_regions(int nid, work_fn_t work_fn, void *data);
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);
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -2939,6 +2939,14 @@ void __init free_bootmem_with_active_reg
}
}
+void __init work_with_active_regions(int nid, work_fn_t work_fn, void *data)
+{
+ int i;
+
+ for_each_active_range_index_in_nid(i, nid)
+ work_fn(early_node_map[i].start_pfn, early_node_map[i].end_pfn,
+ data);
+}
/**
* 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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists