[PATCH] software dirty bits for s390

[Martin Schwidefsky <schwidefsky@de.ibm.com>]

Greetings,

good news, I got performance results for a selected set of workloads
with my software dirty bit patch (thanks Christian!). We found no
downsides to the software dirty bits, and a substantial improvement
in CPU utilization for the FIO test with mostly read mappings.

All good, the patch can now go upstream. The patch changes common
memory management code but the parts that are removed are purely
s390 specific. I can handle it via the linux-s390 tree but I would
not mind if it gets the sign-off by the mm folks.

Martin Schwidefsky (1):
  s390/mm: implement software dirty bits

 arch/s390/include/asm/page.h    |   22 -------
 arch/s390/include/asm/pgtable.h |  131 ++++++++++++++++++++++++++-------------
 arch/s390/include/asm/sclp.h    |    1 -
 arch/s390/include/asm/setup.h   |   16 ++---
 arch/s390/kvm/kvm-s390.c        |    2 +-
 arch/s390/lib/uaccess_pt.c      |    2 +-
 arch/s390/mm/pageattr.c         |    2 +-
 arch/s390/mm/vmem.c             |   24 +++----
 drivers/s390/char/sclp_cmd.c    |   10 +--
 include/asm-generic/pgtable.h   |   10 ---
 include/linux/page-flags.h      |    8 ---
 mm/rmap.c                       |   24 -------
 12 files changed, 112 insertions(+), 140 deletions(-)

-- 
1.7.9.5

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