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    btrfs: Drop EXTENT_UPTODATE check in hole punching and direct locking · fc4adbff
    Alex Gartrell 提交于
    In these instances, we are trying to determine if a page has been accessed
    since we began the operation for the sake of retry.  This is easily
    accomplished by doing a gang lookup in the page mapping radix tree, and it
    saves us the dependency on the flag (so that we might eventually delete
    it).
    
    btrfs_page_exists_in_range borrows heavily from find_get_page, replacing
    the radix tree look up with a gang lookup of 1, so that we can find the
    next highest page >= index and see if it falls into our lock range.
    Signed-off-by: NChris Mason <clm@fb.com>
    Signed-off-by: NAlex Gartrell <agartrell@fb.com>
    fc4adbff
file.c 69.3 KB