• Josef Bacik's avatar
    Btrfs: change how we queue blocks for backref checking · b6c60c80
    Josef Bacik authored
    Previously we only added blocks to the list to have their backrefs checked if
    the level of the block is right above the one we are searching for.  This is
    because we want to make sure we don't add the entire path up to the root to the
    lists to make sure we process things one at a time.  This assumes that if any
    blocks in the path to the root are going to be not checked (shared in other
    words) then they will be in the level right above the current block on up.  This
    isn't quite right though since we can have blocks higher up the list that are
    shared because they are attached to a reloc root.  But we won't add this block
    to be checked and then later on we will BUG_ON(!upper->checked).  So instead
    keep track of wether or not we've queued a block to be checked in this current
    search, and if we haven't go ahead and queue it to be checked.  This patch fixed
    the panic I was seeing where we BUG_ON(!upper->checked).  Thanks,
    Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
    Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
    b6c60c80
relocation.c 108 KB