[PATCH 0/2] Report the size of pages backing VMAs in /proc V3

From: Mel Gorman
Date: Thu Oct 16 2008 - 11:58:46 EST

The following two patches add support for printing the size of pages used by
the kernel and the MMU to back VMAs. This can be used by a user to verify
that a hugepage-aware application is using the expected page sizes.

The first patch prints the size of page used by the kernel when allocating
pages for a VMA in /proc/pid/smaps. The second patch reports on
the size of page used by the MMU as it can differ - for example on POWER
using 64K as a base pagesize on older processors.

Changelog since V2
o Drop changes to /proc/pid/maps - could not get agreement and it affects
procps. Patch to procps was posted but fell into silence. Dropping
patch as smaps gives the necessary information, just with a bit more
legwork by the user
o Drop redundant VM_BUG_ON (Alexey)

Changelog since V1
o Fix build failure on !CONFIG_HUGETLB_PAGE
o Uninline helper functions
o Distinguish between base pagesize and MMU pagesize

arch/powerpc/include/asm/hugetlb.h | 6 ++++++
arch/powerpc/mm/hugetlbpage.c | 7 +++++++
fs/proc/task_mmu.c | 8 ++++++--
include/linux/hugetlb.h | 6 ++++++
mm/hugetlb.c | 29 +++++++++++++++++++++++++++++
5 files changed, 54 insertions(+), 2 deletions(-)

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