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authorMel Gorman <mel@csn.ul.ie>2009-01-06 17:38:54 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 18:58:58 -0500
commit3340289ddf29ca75c3acfb3a6b72f234b2f74d5c (patch)
treed5da94eb1cb0146160fcb0e7aa161bfa5b6ac807 /arch/powerpc/include/asm
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 'arch/powerpc/include/asm')
-rw-r--r--arch/powerpc/include/asm/hugetlb.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
index 26f0d0ab27a..b1dafb6a974 100644
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -18,6 +18,12 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
18 pte_t *ptep); 18 pte_t *ptep);
19 19
20/* 20/*
21 * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
22 * to override the version in mm/hugetlb.c
23 */
24#define vma_mmu_pagesize vma_mmu_pagesize
25
26/*
21 * If the arch doesn't supply something else, assume that hugepage 27 * If the arch doesn't supply something else, assume that hugepage
22 * size aligned regions are ok without further preparation. 28 * size aligned regions are ok without further preparation.
23 */ 29 */