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sh: Move page table allocation out of line

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We also switched away from quicklists and instead moved to slab
caches. After benchmarking both implementations the difference is
negligible. The slab caches suit us better though because the size of a
pgd table is just 4 entries when we're using a 3-level page table layout
and quicklists always deal with pages.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
This commit is contained in:
Matt Fleming
2009-12-31 12:19:24 +00:00
parent b4c8927623
commit 2a5eacca85
6 changed files with 66 additions and 78 deletions
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10
arch/sh/include/asm/pgalloc.h
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@@ -6,10 +6,13 @@
#define QUICK_PT 1 /* Other page table pages that are zero on free */
extern pgd_t *pgd_alloc(struct mm_struct *);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
#ifdef CONFIG_PGTABLE_LEVELS_3
#include <asm/pgalloc_pmd.h>
#else
#include <asm/pgalloc_nopmd.h>
extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
#endif
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
@@ -67,7 +70,6 @@ do { \
static inline void check_pgt_cache(void)
{
__check_pgt_cache();
quicklist_trim(QUICK_PT, NULL, 25, 16);
}