This is important to eg dm, that tries to decide whether to stop using barriers or not. Tested as working by Anders Henke <anders.henke@1und1.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Adds files for barrier handling, rq execution, io context handling, mapping data to requests, and queue settings. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>