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| author | Mel Gorman <mel@csn.ul.ie> | 2009-01-06 14:38:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:58:58 -0800 |
| commit | 3340289ddf29ca75c3acfb3a6b72f234b2f74d5c (patch) | |
| tree | d5da94eb1cb0146160fcb0e7aa161bfa5b6ac807 /include/linux/hugetlb.h | |
| parent | 08fba69986e20c1c9e5fe2e6064d146cc4f42480 (diff) | |
| download | op-kernel-dev-3340289ddf29ca75c3acfb3a6b72f234b2f74d5c.zip op-kernel-dev-3340289ddf29ca75c3acfb3a6b72f234b2f74d5c.tar.gz | |
mm: report the MMU pagesize in /proc/pid/smaps
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>
Diffstat (limited to 'include/linux/hugetlb.h')
| -rw-r--r-- | include/linux/hugetlb.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 648e1e2..f1d2fba1 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -235,6 +235,8 @@ static inline unsigned long huge_page_size(struct hstate *h) extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); +extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); + static inline unsigned long huge_page_mask(struct hstate *h) { return h->mask; @@ -276,6 +278,7 @@ struct hstate {}; #define huge_page_size(h) PAGE_SIZE #define huge_page_mask(h) PAGE_MASK #define vma_kernel_pagesize(v) PAGE_SIZE +#define vma_mmu_pagesize(v) PAGE_SIZE #define huge_page_order(h) 0 #define huge_page_shift(h) PAGE_SHIFT static inline unsigned int pages_per_huge_page(struct hstate *h) |
