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    Subject[PATCHSET 2.6.36-rc2] block, dm: finish REQ_FLUSH/FUA conversion, take#2
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    Hello,

    This is the second take of block-dm-finish-REQ_FLUSH-FUA-conversion.
    I've put patches on top of the previous patches for easier review.
    The series can be trivially reordered so that the order is more
    logical. Jens, please let me know if you want it to be reordered.

    The dm conversion is _lightly_ tested. Please proceed with caution.
    Let's hold off merging these bits until dm people can verify the
    conversion is correct.

    0001-block-make-__blk_rq_prep_clone-copy-most-command-fla.patch
    0002-dm-implement-REQ_FLUSH-FUA-support-for-bio-based-dm.patch
    0003-dm-relax-ordering-of-bio-based-flush-implementation.patch
    0004-dm-implement-REQ_FLUSH-FUA-support-for-request-based.patch
    0005-block-remove-the-WRITE_BARRIER-flag.patch

    Differences from the previous attempt[1] are,

    * bio-based dm and requested-based dm patches are split. 0002-0003
    convert bio-based dm and 0004 converts requested-based dm.

    * The previous requested based dm conversion was broken in the way
    requests are sequenced. This patch rips out special multi-target
    handling for flushes and handles flushes the same way other requests
    are handled.

    This patchset is on top of "block, fs: replace HARDBARRIER with
    FLUSH/FUA" patchset[2] and available in the following git tree

    git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git flush-fua

    and contains the following changes.

    block/blk-core.c | 4
    drivers/md/dm-crypt.c | 2
    drivers/md/dm-io.c | 20 --
    drivers/md/dm-log.c | 2
    drivers/md/dm-raid1.c | 8
    drivers/md/dm-region-hash.c | 16 -
    drivers/md/dm-snap-persistent.c | 2
    drivers/md/dm-snap.c | 6
    drivers/md/dm-stripe.c | 2
    drivers/md/dm.c | 394 ++++++++--------------------------------
    include/linux/blk_types.h | 1
    include/linux/fs.h | 3
    12 files changed, 104 insertions(+), 356 deletions(-)

    Thanks.

    --
    tejun

    [1] http://thread.gmane.org/gmane.linux.raid/29344
    [2] http://thread.gmane.org/gmane.linux.kernel/1022363


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