bugfix: do not start gc task before submitting data io.
add test_bio_entry.c.
bugfix: missing of a header including
bugfix: do not really check csum with n_records is 0 in is_valid_logpack_header_with_checksum().
bugfix: partially valid log including discard requests in redo.
a bit fix.
fix: relax wait loop for log permanence.
refactor: change name of stuffs.
iocore: a bit detailed log in io error.
bugfix: wrong sort of bio wrapper by lsid.
sort data IO for better performance.
bugfix: broken overlapped data FIFO property.
fix: remote trailing spaces.
bugfix: N_IO_BULK must not exceed 256.
refactor: overlapping -> overlapped.
do not use completion for overlapped IO submittion.
add debug code to check FIFO property of overlapped data.
bugfix: use delayed flag instead of n_overlapped to avoid race condition.
modify bio_wrapper flags.
modify bio_entry flags.