diff options
| author | Ingo Molnar <mingo@elte.hu> | 2002-02-19 18:27:40 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2002-02-19 18:27:40 +0100 |
| commit | 3a0b82c08a0e86683783c30d7fec9d1b06c2fe20 (patch) | |
| tree | 0439ad16655bdfbec6dfdd0058e3ce6cdd25c766 /fs/proc/array.c | |
| parent | 094686d30d5f58780a1efda2ade5cb0d18e25f82 (diff) | |
adds simple support for atomically-mapped PTEs. On highmem systems this enables the allocation of the pagetables in highmem.
Diffstat (limited to 'fs/proc/array.c')
| -rw-r--r-- | fs/proc/array.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index a718316d7ffd..7186199d5e4b 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -393,11 +393,10 @@ int proc_pid_stat(struct task_struct *task, char * buffer) return res; } -static inline void statm_pte_range(pmd_t * pmd, unsigned long address, unsigned long size, - int * pages, int * shared, int * dirty, int * total) +static inline void statm_pte_range(pmd_t * pmd, unsigned long address, unsigned long size, int * pages, int * shared, int * dirty, int * total) { - pte_t * pte; - unsigned long end; + unsigned long end, pmd_end; + pte_t *pte; if (pmd_none(*pmd)) return; @@ -406,11 +405,12 @@ static inline void statm_pte_range(pmd_t * pmd, unsigned long address, unsigned pmd_clear(pmd); return; } - pte = pte_offset(pmd, address); - address &= ~PMD_MASK; + preempt_disable(); + pte = pte_offset_map(pmd, address); end = address + size; - if (end > PMD_SIZE) - end = PMD_SIZE; + pmd_end = (address + PMD_SIZE) & PMD_MASK; + if (end > pmd_end) + end = pmd_end; do { pte_t page = *pte; struct page *ptpage; @@ -431,6 +431,8 @@ static inline void statm_pte_range(pmd_t * pmd, unsigned long address, unsigned if (page_count(pte_page(page)) > 1) ++*shared; } while (address < end); + pte_unmap(pte - 1); + preempt_enable(); } static inline void statm_pmd_range(pgd_t * pgd, unsigned long address, unsigned long size, |