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blk_queue_ordered
Langue: en
Version: June 2009 (debian - 07/07/09)
Section: 9 (Appels noyau Linux)
NAME
blk_queue_ordered - does this queue support ordered writesSYNOPSIS
- 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.
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