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    Btrfs: change how we track dirty roots · e7070be1
    Josef Bacik 提交于
    I've been overloading root->dirty_list to keep track of dirty roots and which
    roots need to have their commit roots switched at transaction commit time.  This
    could cause us to lose an update to the root which could corrupt the file
    system.  To fix this use a state bit to know if the root is dirty, and if it
    isn't set we go ahead and move the root to the dirty list.  This way if we
    re-dirty the root after adding it to the switch_commit list we make sure to
    update it.  This also makes it so that the extent root is always the last root
    on the dirty list to try and keep the amount of churn down at this point in the
    commit.  Thanks,
    Signed-off-by: NJosef Bacik <jbacik@fb.com>
    Signed-off-by: NChris Mason <clm@fb.com>
    e7070be1
ctree.h 135.1 KB