resize2fs: use [un]mark_block_range bitmap functions to reduce CPU usage

Use ext2fs_[un]mark_block_range2() functions to reduce the CPU
overhead of resizing large file systems by 45%, primarily by
reducing the time spent in fix_uninit_block_bitmaps().

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2 files changed