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authorMel Gorman2009-01-06 14:38:54 -0800
committerLinus Torvalds2009-01-06 15:58:58 -0800
commit3340289ddf29ca75c3acfb3a6b72f234b2f74d5c (patch)
treed5da94eb1cb0146160fcb0e7aa161bfa5b6ac807 /include
parent08fba69986e20c1c9e5fe2e6064d146cc4f42480 (diff)
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')
-rw-r--r--include/linux/hugetlb.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 648e1e25979e..f1d2fba19ea0 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)