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    Subject[PATCH 0/5] reiserfs: stop using write_supers and s_dirt
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    This patch-set makes reiserfs file-system stop using the VFS '->write_supers()'
    call-back and the '->s_dirt' superblock field because I plan to remove them
    once all users are gone.

    This patch-set makes reiserfs submit a delayed job for writing out old commits
    instead of using 's_dirt'.

    The goal is to get rid of the 'sync_supers()' kernel thread. This kernel thread
    wakes up every 5 seconds (by default) and calls '->write_super()' for all
    mounted file-systems. And the bad thing is that this is done even if all the
    superblocks are clean. Moreover, many file-systems do not even need this end
    they do not register the '->write_super()' method at all (e.g., btrfs).

    So 'sync_supers()' most often just generates useless wake-ups and wastes power.
    I am trying to make all file-systems independent of '->write_super()' and plan
    to remove 'sync_supers()' and '->write_super()' completely once there are no
    more users.

    The '->write_supers()' method is mostly used by baroque file-systems like hfs,
    udf, etc. Modern file-systems like btrfs and xfs do not use it. This justifies
    removing this stuff from VFS completely and make every FS self-manage own
    superblock.

    Al, in the past I was trying to upstream patches which optimized 'sync_super()',
    but you wanted me to kill it completely instead, which I am trying to do
    now, see http://lkml.org/lkml/2010/7/22/96

    Tested using xfstests.

    ======
    Overall status:

    1. ext4: patches submitted, waiting for reply from Ted Ts'o:
    https://lkml.org/lkml/2012/4/2/111
    Ted keeps silence so far WRT the fate of this patch-set.
    2. ext2: done, see commit f72cf5e223a28d3b3ea7dc9e40464fd534e359e8
    3. vfat: done, see commit 78491189ddb6d84d4a4abae992ed891a236d0263
    4. jffs2: sits the mtd subsystem tree, see commit
    208b14e507c00ff7f108e1a388dd3d8cc805a443 in
    git://git.infradead.org/linux-mtd.git

    TODO: affs, exofs, hfs, hfsplus, sysv, udf, ufs
    ======

    Thanks,
    Artem.


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