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    Subject[PATCH 00/18] IO-less dirty throttling v11

    Finally, the complete IO-less balance_dirty_pages(). NFS is observed to perform
    better or worse depending on the memory size. Otherwise the added patches can
    address all known regressions.

    git:// dirty-throttling-v11
    (to be updated; currently it contains a pre-release v11)

    Changes since v10:

    - complete the renames
    - add protections for IO queue underrun
    - pause time reduction
    - bdi reserve area
    - bdi underrun flag
    - more accurate task dirty accounting for
    - sub-page writes
    - FS re-dirties
    - short lived tasks

    Changes since v9:

    - a lot of renames and comment/changelog rework, again
    - seperate out the dirty_ratelimit update policy (as patch 04)
    - add think time compensation
    - add 3 trace events

    Changes since v8:

    - a lot of renames and comment/changelog rework
    - use 3rd order polynomial as the global control line (Peter)
    - stabilize dirty_ratelimit by decreasing update step size on small errors
    - limit per-CPU dirtied pages to avoid dirty pages run away on 1k+ tasks (Peter)

    Thanks a lot to Peter, Vivek, Andrea and Jan for the careful reviews!


    Wu Fengguang (18):
    writeback: account per-bdi accumulated dirtied pages
    writeback: dirty position control
    writeback: dirty rate control
    writeback: stabilize bdi->dirty_ratelimit
    writeback: per task dirty rate limit
    writeback: IO-less balance_dirty_pages()
    writeback: dirty ratelimit - think time compensation
    writeback: trace dirty_ratelimit
    writeback: trace balance_dirty_pages
    writeback: dirty position control - bdi reserve area
    block: add bdi flag to indicate risk of io queue underrun
    writeback: balanced_rate cannot exceed write bandwidth
    writeback: limit max dirty pause time
    writeback: control dirty pause time
    writeback: charge leaked page dirties to active tasks
    writeback: fix dirtied pages accounting on sub-page writes
    writeback: fix dirtied pages accounting on redirty
    btrfs: fix dirtied pages accounting on sub-page writes


    block/blk-core.c | 7
    fs/btrfs/file.c | 3
    fs/fs-writeback.c | 2
    include/linux/backing-dev.h | 26
    include/linux/blkdev.h | 12
    include/linux/sched.h | 8
    include/linux/writeback.h | 5
    include/trace/events/writeback.h | 151 ++++-
    kernel/exit.c | 2
    kernel/fork.c | 4
    mm/backing-dev.c | 3
    mm/page-writeback.c | 768 +++++++++++++++++++++++------
    12 files changed, 816 insertions(+), 175 deletions(-)


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