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| author | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-01-14 23:33:44 +0100 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-07-02 11:01:29 +0200 |
| commit | 5a4d5292779b6163aa41e594a56307e442fbe73c (patch) | |
| tree | 39c9e13e248a8cb91c08a979b7432a48da63240b | |
| parent | avr32: Cover the kernel page tables in the user PGDs (diff) | |
| download | linux-5a4d5292779b6163aa41e594a56307e442fbe73c.tar.xz linux-5a4d5292779b6163aa41e594a56307e442fbe73c.zip | |
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>
| -rw-r--r-- | arch/avr32/Kconfig | 3 | ||||
| -rw-r--r-- | include/asm-avr32/pgalloc.h | 32 |
2 files changed, 23 insertions, 12 deletions
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig index 09ad7995080c..a5793c13f50c 100644 --- a/arch/avr32/Kconfig +++ b/arch/avr32/Kconfig @@ -147,6 +147,9 @@ config PHYS_OFFSET source "kernel/Kconfig.preempt" +config QUICKLIST + def_bool y + config HAVE_ARCH_BOOTMEM_NODE def_bool n 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 @@ #ifndef __ASM_AVR32_PGALLOC_H #define __ASM_AVR32_PGALLOC_H -#include <linux/mm.h> +#include <linux/quicklist.h> +#include <asm/page.h> +#include <asm/pgtable.h> + +#define QUICK_PGD 0 /* Preserve kernel mappings over free */ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) @@ -23,25 +27,26 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, } #define pmd_pgtable(pmd) pmd_page(pmd) +static inline void pgd_ctor(void *x) +{ + pgd_t *pgd = x; + + memcpy(pgd + USER_PTRS_PER_PGD, + swapper_pg_dir + USER_PTRS_PER_PGD, + (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); +} + /* * Allocate and free page tables */ static inline pgd_t *pgd_alloc(struct mm_struct *mm) { - pgd_t *pgd; - - pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT); - if (likely(pgd)) - memcpy(pgd + USER_PTRS_PER_PGD, - swapper_pg_dir + USER_PTRS_PER_PGD, - (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); - - return pgd; + return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor); } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { - free_page((unsigned long)pgd); + quicklist_free(QUICK_PGD, NULL, pgd); } static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, @@ -83,6 +88,9 @@ do { \ tlb_remove_page((tlb), pte); \ } while (0) -#define check_pgt_cache() do { } while(0) +static inline void check_pgt_cache(void) +{ + quicklist_trim(QUICK_PGD, NULL, 25, 16); +} #endif /* __ASM_AVR32_PGALLOC_H */ |