mirror of https://gitee.com/openkylin/linux.git
[SPARC64]: Kill pgtable quicklists and use SLAB.
Taking a nod from the powerpc port. With the per-cpu caching of both the page allocator and SLAB, the pgtable quicklist scheme becomes relatively silly and primitive. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
David S. Miller
parent
05e28f9de6
commit
3c93646524
|
|
@ -241,10 +241,6 @@ EXPORT_SYMBOL(verify_compat_iovec);
|
|||
#endif
|
||||
|
||||
EXPORT_SYMBOL(dump_fpu);
|
||||
EXPORT_SYMBOL(pte_alloc_one_kernel);
|
||||
#ifndef CONFIG_SMP
|
||||
EXPORT_SYMBOL(pgt_quicklists);
|
||||
#endif
|
||||
EXPORT_SYMBOL(put_fs_struct);
|
||||
|
||||
/* math-emu wants this */
|
||||
|
|
|
|||
|
|
@ -141,26 +141,25 @@ unsigned long sparc64_kern_sec_context __read_mostly;
|
|||
|
||||
int bigkernel = 0;
|
||||
|
||||
/* XXX Tune this... */
|
||||
#define PGT_CACHE_LOW 25
|
||||
#define PGT_CACHE_HIGH 50
|
||||
kmem_cache_t *pgtable_cache __read_mostly;
|
||||
|
||||
#ifndef CONFIG_SMP
|
||||
struct pgtable_cache_struct pgt_quicklists;
|
||||
#endif
|
||||
|
||||
void check_pgt_cache(void)
|
||||
static void zero_ctor(void *addr, kmem_cache_t *cache, unsigned long flags)
|
||||
{
|
||||
preempt_disable();
|
||||
if (pgtable_cache_size > PGT_CACHE_HIGH) {
|
||||
do {
|
||||
if (pgd_quicklist)
|
||||
free_pgd_slow(get_pgd_fast());
|
||||
if (pte_quicklist)
|
||||
free_pte_slow(pte_alloc_one_fast());
|
||||
} while (pgtable_cache_size > PGT_CACHE_LOW);
|
||||
clear_page(addr);
|
||||
}
|
||||
|
||||
void pgtable_cache_init(void)
|
||||
{
|
||||
pgtable_cache = kmem_cache_create("pgtable_cache",
|
||||
PAGE_SIZE, PAGE_SIZE,
|
||||
SLAB_HWCACHE_ALIGN |
|
||||
SLAB_MUST_HWCACHE_ALIGN,
|
||||
zero_ctor,
|
||||
NULL);
|
||||
if (!pgtable_cache) {
|
||||
prom_printf("pgtable_cache_init(): Could not create!\n");
|
||||
prom_halt();
|
||||
}
|
||||
preempt_enable();
|
||||
}
|
||||
|
||||
#ifdef CONFIG_DEBUG_DCFLUSH
|
||||
|
|
@ -340,7 +339,6 @@ void show_mem(void)
|
|||
nr_swap_pages << (PAGE_SHIFT-10));
|
||||
printk("%ld pages of RAM\n", num_physpages);
|
||||
printk("%d free pages\n", nr_free_pages());
|
||||
printk("%d pages in page table cache\n",pgtable_cache_size);
|
||||
}
|
||||
|
||||
void mmu_info(struct seq_file *m)
|
||||
|
|
|
|||
|
|
@ -17,14 +17,7 @@ typedef struct {
|
|||
unsigned long clock_tick; /* %tick's per second */
|
||||
unsigned long udelay_val;
|
||||
|
||||
/* Dcache line 2 */
|
||||
unsigned int pgcache_size;
|
||||
unsigned int __pad1;
|
||||
unsigned long *pte_cache;
|
||||
unsigned long *pgd_cache;
|
||||
unsigned long __pad2;
|
||||
|
||||
/* Dcache line 3, rarely used */
|
||||
/* Dcache line 2, rarely used */
|
||||
unsigned int dcache_size;
|
||||
unsigned int dcache_line_size;
|
||||
unsigned int icache_size;
|
||||
|
|
|
|||
|
|
@ -6,6 +6,7 @@
|
|||
#include <linux/kernel.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include <asm/spitfire.h>
|
||||
#include <asm/cpudata.h>
|
||||
|
|
@ -13,164 +14,59 @@
|
|||
#include <asm/page.h>
|
||||
|
||||
/* Page table allocation/freeing. */
|
||||
#ifdef CONFIG_SMP
|
||||
/* Sliiiicck */
|
||||
#define pgt_quicklists local_cpu_data()
|
||||
#else
|
||||
extern struct pgtable_cache_struct {
|
||||
unsigned long *pgd_cache;
|
||||
unsigned long *pte_cache;
|
||||
unsigned int pgcache_size;
|
||||
} pgt_quicklists;
|
||||
#endif
|
||||
#define pgd_quicklist (pgt_quicklists.pgd_cache)
|
||||
#define pte_quicklist (pgt_quicklists.pte_cache)
|
||||
#define pgtable_cache_size (pgt_quicklists.pgcache_size)
|
||||
extern kmem_cache_t *pgtable_cache;
|
||||
|
||||
static inline void free_pgd_fast(pgd_t *pgd)
|
||||
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
||||
{
|
||||
preempt_disable();
|
||||
*(unsigned long *)pgd = (unsigned long) pgd_quicklist;
|
||||
pgd_quicklist = (unsigned long *) pgd;
|
||||
pgtable_cache_size++;
|
||||
preempt_enable();
|
||||
return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
|
||||
}
|
||||
|
||||
static inline pgd_t *get_pgd_fast(void)
|
||||
static inline void pgd_free(pgd_t *pgd)
|
||||
{
|
||||
unsigned long *ret;
|
||||
|
||||
preempt_disable();
|
||||
if((ret = pgd_quicklist) != NULL) {
|
||||
pgd_quicklist = (unsigned long *)(*ret);
|
||||
ret[0] = 0;
|
||||
pgtable_cache_size--;
|
||||
preempt_enable();
|
||||
} else {
|
||||
preempt_enable();
|
||||
ret = (unsigned long *) __get_free_page(GFP_KERNEL|__GFP_REPEAT);
|
||||
if(ret)
|
||||
memset(ret, 0, PAGE_SIZE);
|
||||
}
|
||||
return (pgd_t *)ret;
|
||||
}
|
||||
|
||||
static inline void free_pgd_slow(pgd_t *pgd)
|
||||
{
|
||||
free_page((unsigned long)pgd);
|
||||
kmem_cache_free(pgtable_cache, pgd);
|
||||
}
|
||||
|
||||
#define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD)
|
||||
|
||||
static inline pmd_t *pmd_alloc_one_fast(void)
|
||||
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
|
||||
{
|
||||
unsigned long *ret;
|
||||
|
||||
preempt_disable();
|
||||
ret = (unsigned long *) pte_quicklist;
|
||||
if (likely(ret)) {
|
||||
pte_quicklist = (unsigned long *)(*ret);
|
||||
ret[0] = 0;
|
||||
pgtable_cache_size--;
|
||||
}
|
||||
preempt_enable();
|
||||
|
||||
return (pmd_t *) ret;
|
||||
return kmem_cache_alloc(pgtable_cache,
|
||||
GFP_KERNEL|__GFP_REPEAT);
|
||||
}
|
||||
|
||||
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
|
||||
static inline void pmd_free(pmd_t *pmd)
|
||||
{
|
||||
pmd_t *pmd;
|
||||
|
||||
pmd = pmd_alloc_one_fast();
|
||||
if (unlikely(!pmd)) {
|
||||
pmd = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
|
||||
if (pmd)
|
||||
memset(pmd, 0, PAGE_SIZE);
|
||||
}
|
||||
return pmd;
|
||||
kmem_cache_free(pgtable_cache, pmd);
|
||||
}
|
||||
|
||||
static inline void free_pmd_fast(pmd_t *pmd)
|
||||
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
||||
unsigned long address)
|
||||
{
|
||||
preempt_disable();
|
||||
*(unsigned long *)pmd = (unsigned long) pte_quicklist;
|
||||
pte_quicklist = (unsigned long *) pmd;
|
||||
pgtable_cache_size++;
|
||||
preempt_enable();
|
||||
return kmem_cache_alloc(pgtable_cache,
|
||||
GFP_KERNEL|__GFP_REPEAT);
|
||||
}
|
||||
|
||||
static inline void free_pmd_slow(pmd_t *pmd)
|
||||
static inline struct page *pte_alloc_one(struct mm_struct *mm,
|
||||
unsigned long address)
|
||||
{
|
||||
free_page((unsigned long)pmd);
|
||||
return virt_to_page(pte_alloc_one_kernel(mm, address));
|
||||
}
|
||||
|
||||
static inline void pte_free_kernel(pte_t *pte)
|
||||
{
|
||||
kmem_cache_free(pgtable_cache, pte);
|
||||
}
|
||||
|
||||
static inline void pte_free(struct page *ptepage)
|
||||
{
|
||||
pte_free_kernel(page_address(ptepage));
|
||||
}
|
||||
|
||||
|
||||
#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE)
|
||||
#define pmd_populate(MM,PMD,PTE_PAGE) \
|
||||
pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
|
||||
|
||||
static inline pte_t *pte_alloc_one_fast(void)
|
||||
{
|
||||
unsigned long *ret;
|
||||
|
||||
preempt_disable();
|
||||
ret = (unsigned long *) pte_quicklist;
|
||||
if (likely(ret)) {
|
||||
pte_quicklist = (unsigned long *)(*ret);
|
||||
ret[0] = 0;
|
||||
pgtable_cache_size--;
|
||||
}
|
||||
preempt_enable();
|
||||
|
||||
return (pte_t *) ret;
|
||||
}
|
||||
|
||||
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
|
||||
{
|
||||
pte_t *ptep = pte_alloc_one_fast();
|
||||
|
||||
if (likely(ptep))
|
||||
return ptep;
|
||||
|
||||
return (pte_t *) get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
|
||||
}
|
||||
|
||||
static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr)
|
||||
{
|
||||
pte_t *pte = pte_alloc_one_fast();
|
||||
|
||||
if (likely(pte))
|
||||
return virt_to_page(pte);
|
||||
|
||||
return alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
|
||||
}
|
||||
|
||||
static inline void free_pte_fast(pte_t *pte)
|
||||
{
|
||||
preempt_disable();
|
||||
*(unsigned long *)pte = (unsigned long) pte_quicklist;
|
||||
pte_quicklist = (unsigned long *) pte;
|
||||
pgtable_cache_size++;
|
||||
preempt_enable();
|
||||
}
|
||||
|
||||
static inline void free_pte_slow(pte_t *pte)
|
||||
{
|
||||
free_page((unsigned long) pte);
|
||||
}
|
||||
|
||||
static inline void pte_free_kernel(pte_t *pte)
|
||||
{
|
||||
free_pte_fast(pte);
|
||||
}
|
||||
|
||||
static inline void pte_free(struct page *ptepage)
|
||||
{
|
||||
free_pte_fast(page_address(ptepage));
|
||||
}
|
||||
|
||||
#define pmd_free(pmd) free_pmd_fast(pmd)
|
||||
#define pgd_free(pgd) free_pgd_fast(pgd)
|
||||
#define pgd_alloc(mm) get_pgd_fast()
|
||||
#define check_pgt_cache() do { } while (0)
|
||||
|
||||
#endif /* _SPARC64_PGALLOC_H */
|
||||
|
|
|
|||
|
|
@ -432,12 +432,7 @@ extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
|
|||
unsigned long);
|
||||
#define HAVE_ARCH_FB_UNMAPPED_AREA
|
||||
|
||||
/*
|
||||
* No page table caches to initialise
|
||||
*/
|
||||
#define pgtable_cache_init() do { } while (0)
|
||||
|
||||
extern void check_pgt_cache(void);
|
||||
extern void pgtable_cache_init(void);
|
||||
|
||||
#endif /* !(__ASSEMBLY__) */
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue