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author | David S. Miller <davem@davemloft.net> | 2006-02-01 02:30:27 (GMT) |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 09:11:14 (GMT) |
commit | 3c936465249f863f322154ff1aaa628b84ee5750 (patch) | |
tree | 2bd7a229236f197d20a655133370e5d0c1bf886c /include/asm-sparc64/pgalloc.h | |
parent | 05e28f9de65a38bb0c769080e91b6976e7e1e70c (diff) | |
download | linux-fsl-qoriq-3c936465249f863f322154ff1aaa628b84ee5750.tar.xz |
[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>
Diffstat (limited to 'include/asm-sparc64/pgalloc.h')
-rw-r--r-- | include/asm-sparc64/pgalloc.h | 158 |
1 files changed, 27 insertions, 131 deletions
diff --git a/include/asm-sparc64/pgalloc.h b/include/asm-sparc64/pgalloc.h index ecea1bb..12e4a27 100644 --- a/include/asm-sparc64/pgalloc.h +++ b/include/asm-sparc64/pgalloc.h @@ -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) -{ - 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; -} - -static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) -{ - 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; -} - -static inline void free_pmd_fast(pmd_t *pmd) -{ - preempt_disable(); - *(unsigned long *)pmd = (unsigned long) pte_quicklist; - pte_quicklist = (unsigned long *) pmd; - pgtable_cache_size++; - preempt_enable(); -} - -static inline void free_pmd_slow(pmd_t *pmd) -{ - free_page((unsigned long)pmd); -} - -#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) +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 (pte_t *) ret; + return kmem_cache_alloc(pgtable_cache, + GFP_KERNEL|__GFP_REPEAT); } -static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) +static inline void pmd_free(pmd_t *pmd) { - pte_t *ptep = pte_alloc_one_fast(); - - if (likely(ptep)) - return ptep; - - return (pte_t *) get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); + kmem_cache_free(pgtable_cache, pmd); } -static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr) +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) { - 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); + return kmem_cache_alloc(pgtable_cache, + GFP_KERNEL|__GFP_REPEAT); } -static inline void free_pte_fast(pte_t *pte) +static inline struct page *pte_alloc_one(struct mm_struct *mm, + unsigned long address) { - preempt_disable(); - *(unsigned long *)pte = (unsigned long) pte_quicklist; - pte_quicklist = (unsigned long *) pte; - pgtable_cache_size++; - preempt_enable(); + return virt_to_page(pte_alloc_one_kernel(mm, address)); } - -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); + kmem_cache_free(pgtable_cache, pte); } static inline void pte_free(struct page *ptepage) { - free_pte_fast(page_address(ptepage)); + pte_free_kernel(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 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)) + +#define check_pgt_cache() do { } while (0) #endif /* _SPARC64_PGALLOC_H */ |