3340289ddf
The KernelPageSize entry in /proc/pid/smaps is the pagesize used by the kernel to back a VMA. This matches the size used by the MMU in the majority of cases. However, one counter-example occurs on PPC64 kernels whereby a kernel using 64K as a base pagesize may still use 4K pages for the MMU on older processor. To distinguish, this patch reports MMUPageSize as the pagesize used by the MMU in /proc/pid/smaps. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: "KOSAKI Motohiro" <kosaki.motohiro@jp.fujitsu.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
#ifndef _ASM_POWERPC_HUGETLB_H
|
|
#define _ASM_POWERPC_HUGETLB_H
|
|
|
|
#include <asm/page.h>
|
|
|
|
|
|
int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
|
|
unsigned long len);
|
|
|
|
void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
|
|
unsigned long end, unsigned long floor,
|
|
unsigned long ceiling);
|
|
|
|
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, pte_t pte);
|
|
|
|
pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep);
|
|
|
|
/*
|
|
* The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
|
|
* to override the version in mm/hugetlb.c
|
|
*/
|
|
#define vma_mmu_pagesize vma_mmu_pagesize
|
|
|
|
/*
|
|
* If the arch doesn't supply something else, assume that hugepage
|
|
* size aligned regions are ok without further preparation.
|
|
*/
|
|
static inline int prepare_hugepage_range(struct file *file,
|
|
unsigned long addr, unsigned long len)
|
|
{
|
|
struct hstate *h = hstate_file(file);
|
|
if (len & ~huge_page_mask(h))
|
|
return -EINVAL;
|
|
if (addr & ~huge_page_mask(h))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
|
|
{
|
|
}
|
|
|
|
static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
}
|
|
|
|
static inline int huge_pte_none(pte_t pte)
|
|
{
|
|
return pte_none(pte);
|
|
}
|
|
|
|
static inline pte_t huge_pte_wrprotect(pte_t pte)
|
|
{
|
|
return pte_wrprotect(pte);
|
|
}
|
|
|
|
static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep,
|
|
pte_t pte, int dirty)
|
|
{
|
|
return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
|
|
}
|
|
|
|
static inline pte_t huge_ptep_get(pte_t *ptep)
|
|
{
|
|
return *ptep;
|
|
}
|
|
|
|
static inline int arch_prepare_hugepage(struct page *page)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void arch_release_hugepage(struct page *page)
|
|
{
|
|
}
|
|
|
|
#endif /* _ASM_POWERPC_HUGETLB_H */
|