Commits
Liu Bo committed 51fab693477
Btrfs: use token to avoid times mapping extent buffer The API in tree log code has done sort of changes, and it proves that we can benifit from using token, so do the same thing here. function_graph tracer's timer shows that it costs nearly half time of before(39.788us -> 22.391us). Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>