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authorHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-01-14 17:33:44 -0500
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-07-02 05:01:29 -0400
commit5a4d5292779b6163aa41e594a56307e442fbe73c (patch)
tree39c9e13e248a8cb91c08a979b7432a48da63240b /include/asm-avr32
parenta9a934f278613885816aa9f177968c1dac557240 (diff)
avr32: Use a quicklist for PGD allocation
Use a quicklist to allocate process PGDs. This is expected to be slightly faster since we need to copy entries from swapper_pg_dir, which can stay around for pages on the PGD quick list. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'include/asm-avr32')
-rw-r--r--include/asm-avr32/pgalloc.h32
1 files changed, 20 insertions, 12 deletions
diff --git a/include/asm-avr32/pgalloc.h b/include/asm-avr32/pgalloc.h
index e9636d1f383f..a291f59659cf 100644
--- a/include/asm-avr32/pgalloc.h
+++ b/include/asm-avr32/pgalloc.h
@@ -8,7 +8,11 @@
8#ifndef __ASM_AVR32_PGALLOC_H 8#ifndef __ASM_AVR32_PGALLOC_H
9#define __ASM_AVR32_PGALLOC_H 9#define __ASM_AVR32_PGALLOC_H
10 10
11#include <linux/mm.h> 11#include <linux/quicklist.h>
12#include <asm/page.h>
13#include <asm/pgtable.h>
14
15#define QUICK_PGD 0 /* Preserve kernel mappings over free */
12 16
13static inline void pmd_populate_kernel(struct mm_struct *mm, 17static inline void pmd_populate_kernel(struct mm_struct *mm,
14 pmd_t *pmd, pte_t *pte) 18 pmd_t *pmd, pte_t *pte)
@@ -23,25 +27,26 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
23} 27}
24#define pmd_pgtable(pmd) pmd_page(pmd) 28#define pmd_pgtable(pmd) pmd_page(pmd)
25 29
30static inline void pgd_ctor(void *x)
31{
32 pgd_t *pgd = x;
33
34 memcpy(pgd + USER_PTRS_PER_PGD,
35 swapper_pg_dir + USER_PTRS_PER_PGD,
36 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
37}
38
26/* 39/*
27 * Allocate and free page tables 40 * Allocate and free page tables
28 */ 41 */
29static inline pgd_t *pgd_alloc(struct mm_struct *mm) 42static inline pgd_t *pgd_alloc(struct mm_struct *mm)
30{ 43{
31 pgd_t *pgd; 44 return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
32
33 pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
34 if (likely(pgd))
35 memcpy(pgd + USER_PTRS_PER_PGD,
36 swapper_pg_dir + USER_PTRS_PER_PGD,
37 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
38
39 return pgd;
40} 45}
41 46
42static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 47static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
43{ 48{
44 free_page((unsigned long)pgd); 49 quicklist_free(QUICK_PGD, NULL, pgd);
45} 50}
46 51
47static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 52static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
@@ -83,6 +88,9 @@ do { \
83 tlb_remove_page((tlb), pte); \ 88 tlb_remove_page((tlb), pte); \
84} while (0) 89} while (0)
85 90
86#define check_pgt_cache() do { } while(0) 91static inline void check_pgt_cache(void)
92{
93 quicklist_trim(QUICK_PGD, NULL, 25, 16);
94}
87 95
88#endif /* __ASM_AVR32_PGALLOC_H */ 96#endif /* __ASM_AVR32_PGALLOC_H */