[patch 0/5] per-zone dirty limits v3

[Johannes Weiner]

Hi,

this is the third revision of the per-zone dirty limits.  Changes from
the second version have been mostly documentation, changelog, and
naming fixes based on review feedback:

o add new dirty_balance_reserve instead of abusing totalreserve_pages
  for undirtyable (per-zone) reserves and document the variable and
  its calculation (Mel)
o use !ALLOC_WMARK_LOW instead of adding new ALLOC_SLOWPATH (Mel)
o rename determine_dirtyable_memory -> global_dirtyable_memory (Andrew)
o better explain behaviour on NUMA in changelog (Andrew)
o extend changelogs and code comments on how per-zone dirty limits are
  calculated, and why, and their proportions to the global limit (Mel, Andrew)
o kernel-doc zone_dirty_ok() (Andrew)
o extend changelogs and code comments on how per-zone dirty limits are
  used to protect zones from dirty pages (Mel, Andrew)
o revert back to a separate set of zone_dirtyable_memory() and zone_dirty_limit()
  for easier reading (Andrew)

Based on v3.1-rc3-mmotm-2011-08-24-14-08.

 fs/btrfs/file.c           |    2 +-
 include/linux/gfp.h       |    4 +-
 include/linux/mmzone.h    |    6 ++
 include/linux/swap.h      |    1 +
 include/linux/writeback.h |    1 +
 mm/filemap.c              |    5 +-
 mm/page-writeback.c       |  181 +++++++++++++++++++++++++++++++++------------
 mm/page_alloc.c           |   48 ++++++++++++
 8 files changed, 197 insertions(+), 51 deletions(-)
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