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avr32: Use a quicklist for PTE allocation as well 

Using a quicklist to allocate PTEs might be slightly faster than using
the page allocator directly since we might avoid zeroing the page
after each allocation.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
This commit is contained in:
Haavard Skinnemoen 2008-01-14 23:35:32 +01:00
parent 5a4d529277
commit 38510754a5
2 changed files with 16 additions and 14 deletions
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28
include/asm-avr32/pgalloc.h
View File

@ -13,6 +13,7 @@
#include <asm/pgtable.h> #include <asm/pgtable.h>
#define QUICK_PGD 0 /* Preserve kernel mappings over free */ #define QUICK_PGD 0 /* Preserve kernel mappings over free */
#define QUICK_PT 1 /* Zero on free */
static inline void pmd_populate_kernel(struct mm_struct *mm, static inline void pmd_populate_kernel(struct mm_struct *mm,
pmd_t *pmd, pte_t *pte) pmd_t *pmd, pte_t *pte)
@ -52,34 +53,34 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address) unsigned long address)
{ {
pte_t *pte; return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
return pte;
} }
static inline struct page *pte_alloc_one(struct mm_struct *mm, static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address) unsigned long address)
{ {
struct page *pte; struct page *page;
void *pg;
pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
if (!pte) if (!pg)
return NULL; return NULL;
pgtable_page_ctor(pte);
return pte; page = virt_to_page(pg);
pgtable_page_ctor(page);
return page;
} }
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{ {
free_page((unsigned long)pte); quicklist_free(QUICK_PT, NULL, pte);
} }
static inline void pte_free(struct mm_struct *mm, pgtable_t pte) static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{ {
pgtable_page_dtor(pte); pgtable_page_dtor(pte);
__free_page(pte); quicklist_free_page(QUICK_PT, NULL, pte);
} }
#define __pte_free_tlb(tlb,pte) \ #define __pte_free_tlb(tlb,pte) \
@ -91,6 +92,7 @@ do { \
static inline void check_pgt_cache(void) static inline void check_pgt_cache(void)
{ {
quicklist_trim(QUICK_PGD, NULL, 25, 16); quicklist_trim(QUICK_PGD, NULL, 25, 16);
quicklist_trim(QUICK_PT, NULL, 25, 16);
} }
#endif /* __ASM_AVR32_PGALLOC_H */ #endif /* __ASM_AVR32_PGALLOC_H */

2
mm/Kconfig
View File

@ -199,7 +199,7 @@ config BOUNCE
config NR_QUICK config NR_QUICK
int int
depends on QUICKLIST depends on QUICKLIST
default "2" if SUPERH default "2" if SUPERH || AVR32
default "1" default "1"
config VIRT_TO_BUS config VIRT_TO_BUS