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    Subject[PATCH 00/18] writeback fixes and cleanups for 2.6.40 (v4)

    Andrew,

    The first 10 patches are already in -mm tree, with updates:

    - remove "writeback: pass writeback_control down to move_expired_inodes()", and
    resolve the resulting merge conflicts in other patches.
    - move ahead the sync livelock prevention patches (01, 02) so that (04) won't livelock sync
    - merge the three -mm fixes to (08)
    - fixed changelog of (01)
    - rename .for_sync to .tagged_writepages

    [PATCH 01/18] writeback: introduce .tagged_writepages for the WB_SYNC_NONE sync stage
    [PATCH 02/18] writeback: update dirtied_when for synced inode to prevent livelock
    [PATCH 03/18] writeback: introduce writeback_control.inodes_cleaned
    [PATCH 04/18] writeback: try more writeback as long as something was written
    [PATCH 05/18] writeback: the kupdate expire timestamp should be a moving target
    [PATCH 06/18] writeback: sync expired inodes first in background writeback
    [PATCH 07/18] writeback: refill b_io iff empty
    [PATCH 08/18] writeback: split inode_wb_list_lock into bdi_writeback.list_lock
    [PATCH 09/18] writeback: elevate queue_io() into wb_writeback()
    [PATCH 10/18] writeback: avoid extra sync work at enqueue time

    The following 6 patches are trivial and safe

    [PATCH 11/18] writeback: add bdi_dirty_limit() kernel-doc
    [PATCH 12/18] writeback: skip balance_dirty_pages() for in-memory fs
    [PATCH 13/18] writeback: remove writeback_control.more_io
    [PATCH 14/18] writeback: remove .nonblocking and .encountered_congestion
    [PATCH 15/18] writeback: trace event writeback_single_inode
    [PATCH 16/18] writeback: trace event writeback_queue_io

    Patch 17 is a bit more complex

    [PATCH 17/18] writeback: make writeback_control.nr_to_write straight
    [PATCH 18/18] writeback: rearrange the wb_writeback() loop

    Thanks to Jan and Dave for the careful reviews!

    The patches are git pullable from

    git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback.git fs-writeback

    fs/block_dev.c | 16 +-
    fs/btrfs/extent_io.c | 2 -
    fs/ext4/inode.c | 4 +-
    fs/fs-writeback.c | 411 +++++++++++++++++++++-----------------
    fs/inode.c | 5 +-
    fs/nfs/write.c | 3 +-
    fs/xfs/linux-2.6/xfs_aops.c | 2 +-
    include/linux/backing-dev.h | 2 +
    include/linux/writeback.h | 14 +-
    include/trace/events/btrfs.h | 6 +-
    include/trace/events/ext4.h | 6 +-
    include/trace/events/writeback.h | 137 ++++++++++++--
    mm/backing-dev.c | 30 ++-
    mm/filemap.c | 6 +-
    mm/page-writeback.c | 42 ++--
    mm/rmap.c | 4 +-
    16 files changed, 420 insertions(+), 270 deletions(-)

    Thanks,
    Fengguang



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