1BLK_QUEUE_ORDERED(9)             Block Devices            BLK_QUEUE_ORDERED(9)
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NAME

6       blk_queue_ordered - does this queue support ordered writes
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SYNOPSIS

9       int blk_queue_ordered(struct request_queue * q, unsigned ordered,
10                             prepare_flush_fn * prepare_flush_fn);
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ARGUMENTS

13       q
14           the request queue
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16       ordered
17           one of QUEUE_ORDERED_*
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19       prepare_flush_fn
20           rq setup helper for cache flush ordered writes
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DESCRIPTION

23       For journalled file systems, doing ordered writes on a commit block
24       instead of explicitly doing wait_on_buffer (which is bad for
25       performance) can be a big win. Block drivers supporting this feature
26       should call this function and indicate so.
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29Kernel Hackers Manual 2.6.       November 2011            BLK_QUEUE_ORDERED(9)
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