blk_queue_ordered(9)
NAME
blk_queue_ordered - does this queue support ordered writes
SYNOPSIS
int blk_queue_ordered(struct request_queue * q, unsigned ordered,
prepare_flush_fn * prepare_flush_fn);
ARGUMENTS
- q
- the request queue
- ordered
- one of QUEUE_ORDERED_*
- prepare_flush_fn
- rq setup helper for cache flush ordered writes
DESCRIPTION
For journalled file systems, doing ordered writes on a commit block
instead of explicitly doing wait_on_buffer (which is bad for
performance) can be a big win. Block drivers supporting this feature
should call this function and indicate so.