[PATCH 1/5] Add "virtual kernel memory..." printout.
Andreas Fenkart
andreas.fenkart at streamunlimited.com
Thu Jan 14 05:36:06 EST 2010
Code based on parisc and x86_32.
Signed-off-by: Andreas Fenkart <andreas.fenkart at streamunlimited.com>
---
arch/arm/mm/init.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 69 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index a04ffbb..29d5866 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -23,6 +23,7 @@
#include <asm/setup.h>
#include <asm/sizes.h>
#include <asm/tlb.h>
+#include <asm/fixmap.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@@ -560,7 +561,7 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi)
*/
void __init mem_init(void)
{
- unsigned int codesize, datasize, initsize;
+ unsigned long reserved_pages, free_pages;
int i, node;
#ifndef CONFIG_DISCONTIGMEM
@@ -596,6 +597,33 @@ void __init mem_init(void)
totalram_pages += totalhigh_pages;
#endif
+ reserved_pages = free_pages = 0;
+
+ for_each_online_node(node) {
+ pg_data_t *n = NODE_DATA(node);
+ struct page *map = pgdat_page_nr(n, 0) - n->node_start_pfn;
+
+ for_each_nodebank(i, &meminfo, node) {
+ struct membank *bank = &meminfo.bank[i];
+ unsigned int pfn1, pfn2;
+ struct page *page, *end;
+
+ pfn1 = bank_pfn_start(bank);
+ pfn2 = bank_pfn_end(bank);
+
+ page = map + pfn1;
+ end = map + pfn2;
+
+ do {
+ if (PageReserved(page))
+ reserved_pages++;
+ else if (!page_count(page))
+ free_pages++;
+ page++;
+ } while (page < end);
+ }
+ }
+
/*
* Since our memory may not be contiguous, calculate the
* real number of pages we have in this system
@@ -608,16 +636,48 @@ void __init mem_init(void)
}
printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
- codesize = _etext - _text;
- datasize = _end - _data;
- initsize = __init_end - __init_begin;
-
- printk(KERN_NOTICE "Memory: %luKB available (%dK code, "
- "%dK data, %dK init, %luK highmem)\n",
- nr_free_pages() << (PAGE_SHIFT-10), codesize >> 10,
- datasize >> 10, initsize >> 10,
+ printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
+ nr_free_pages() << (PAGE_SHIFT-10),
+ free_pages << (PAGE_SHIFT-10),
+ reserved_pages << (PAGE_SHIFT-10),
totalhigh_pages << (PAGE_SHIFT-10));
+#define MLK(b, t) b, t, ((t) - (b)) >> 10
+#define MLM(b, t) b, t, ((t) - (b)) >> 20
+#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
+
+ printk(KERN_NOTICE "virtual kernel memory layout:\n"
+ " vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
+ " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
+#ifdef CONFIG_HIGHMEM
+ " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n"
+#endif
+ " modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
+ " .init : 0x%p" " - 0x%p" " (%4d kB)\n"
+ " .text : 0x%p" " - 0x%p" " (%4d kB)\n"
+ " .data : 0x%p" " - 0x%p" " (%4d kB)\n",
+
+ MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
+ (PAGE_SIZE)),
+ MLK(FIXADDR_START, FIXADDR_TOP),
+ MLM(VMALLOC_START, (unsigned long)VMALLOC_END),
+ MLM(PAGE_SIZE, (unsigned long)high_memory),
+#ifdef CONFIG_HIGHMEM
+ MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
+ (PAGE_SIZE)),
+#endif
+ MLM(MODULES_VADDR, MODULES_END),
+
+ MLK_ROUNDUP(__init_begin, __init_end),
+ MLK_ROUNDUP(_text, _etext),
+ MLK_ROUNDUP(_data, _edata));
+
+#undef MLK
+#undef MLM
+#undef MLK_ROUNDUP
+
if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
extern int sysctl_overcommit_memory;
/*
--
1.6.6
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