patch-2.1.106 linux/arch/alpha/mm/init.c
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- Lines: 121
- Date:
Sat Jun 13 12:48:10 1998
- Orig file:
v2.1.105/linux/arch/alpha/mm/init.c
- Orig date:
Wed Apr 1 20:11:47 1998
diff -u --recursive --new-file v2.1.105/linux/arch/alpha/mm/init.c linux/arch/alpha/mm/init.c
@@ -28,6 +28,67 @@
struct thread_struct * original_pcb_ptr;
+#ifndef __SMP__
+struct pgtable_cache_struct quicklists;
+#endif
+
+void __bad_pmd(pgd_t *pgd)
+{
+ printk("Bad pgd in pmd_alloc: %08lx\n", pgd_val(*pgd));
+ pgd_set(pgd, BAD_PAGETABLE);
+}
+
+void __bad_pte(pmd_t *pmd)
+{
+ printk("Bad pmd in pte_alloc: %08lx\n", pmd_val(*pmd));
+ pmd_set(pmd, (pte_t *) BAD_PAGETABLE);
+}
+
+pmd_t *get_pmd_slow(pgd_t *pgd, unsigned long offset)
+{
+ pmd_t *pmd;
+
+ pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
+ if (pgd_none(*pgd)) {
+ if (pmd) {
+ clear_page((unsigned long)pmd);
+ pgd_set(pgd, pmd);
+ return pmd + offset;
+ }
+ pgd_set(pgd, BAD_PAGETABLE);
+ return NULL;
+ }
+ free_page((unsigned long)pmd);
+ if (pgd_bad(*pgd)) {
+ __bad_pmd(pgd);
+ return NULL;
+ }
+ return (pmd_t *) pgd_page(*pgd) + offset;
+}
+
+pte_t *get_pte_slow(pmd_t *pmd, unsigned long offset)
+{
+ pte_t *pte;
+
+ pte = (pte_t *) __get_free_page(GFP_KERNEL);
+ if (pmd_none(*pmd)) {
+ if (pte) {
+ clear_page((unsigned long)pte);
+ pmd_set(pmd, pte);
+ return pte + offset;
+ }
+ pmd_set(pmd, (pte_t *) BAD_PAGETABLE);
+ return NULL;
+ }
+ free_page((unsigned long)pte);
+ if (pmd_bad(*pmd)) {
+ __bad_pte(pmd);
+ return NULL;
+ }
+ return (pte_t *) pmd_page(*pmd) + offset;
+}
+
+
/*
* BAD_PAGE is the page that is used for page faults when linux
* is out-of-memory. Older versions of linux just did a
@@ -56,7 +117,7 @@
void show_mem(void)
{
int i,free = 0,total = 0,reserved = 0;
- int shared = 0;
+ int shared = 0, cached = 0;
printk("\nMem-info:\n");
show_free_areas();
@@ -66,6 +127,8 @@
total++;
if (PageReserved(mem_map+i))
reserved++;
+ else if (PageSwapCache(mem_map+i))
+ cached++;
else if (!atomic_read(&mem_map[i].count))
free++;
else
@@ -75,6 +138,8 @@
printk("%d free pages\n",free);
printk("%d reserved pages\n",reserved);
printk("%d pages shared\n",shared);
+ printk("%d pages swap cached\n",cached);
+ printk("%d pages in page table cache\n",pgtable_cache_size);
show_buffers();
#ifdef CONFIG_NET
show_net_buffers();
@@ -213,16 +278,16 @@
void free_initmem (void)
{
- extern char __init_begin, __init_end;
- unsigned long addr;
+ extern char __init_begin, __init_end;
+ unsigned long addr;
- addr = (unsigned long)(&__init_begin);
- for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
- mem_map[MAP_NR(addr)].flags &= ~(1 << PG_reserved);
- atomic_set(&mem_map[MAP_NR(addr)].count, 1);
- free_page(addr);
- }
- printk ("Freeing unused kernel memory: %ldk freed\n",
+ addr = (unsigned long)(&__init_begin);
+ for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
+ mem_map[MAP_NR(addr)].flags &= ~(1 << PG_reserved);
+ atomic_set(&mem_map[MAP_NR(addr)].count, 1);
+ free_page(addr);
+ }
+ printk ("Freeing unused kernel memory: %ldk freed\n",
(&__init_end - &__init_begin) >> 10);
}
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