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.