[PATCH RFC 0/3] pagemap: make useable for non-privilege users

From: Konstantin Khlebnikov
Date: Tue May 12 2015 - 05:43:17 EST

This patchset tries to make pagemap useable again in the safe way.
First patch adds bit 'map-exlusive' which is set if page is mapped only here.
Second patch restores access for non-privileged users but hides pfn if task
has no capability CAP_SYS_ADMIN. Third patch removes page-shift bits and
completes migration to the new pagemap format (flags soft-dirty and
mmap-exlusive are available only in the new format).


Konstantin Khlebnikov (3):
pagemap: add mmap-exclusive bit for marking pages mapped only here
pagemap: hide physical addresses from non-privileged users
pagemap: switch to the new format and do some cleanup

Documentation/vm/pagemap.txt | 3 -
fs/proc/task_mmu.c | 178 +++++++++++++++++-------------------------
tools/vm/page-types.c | 35 ++++----
3 files changed, 91 insertions(+), 125 deletions(-)
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