blk_queue_ordered

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)

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.