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Commit daef265f authored by Jens Axboe's avatar Jens Axboe Committed by Linus Torvalds
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[PATCH] dm: don't enable bouncing by default 



DM doesn't need to bounce bio's on its own, but the block layer defaults
to that in blk_queue_make_request(). The lower level drivers should
bounce ios themselves, that is what they need to do if not layered below
dm anyways.

Signed-off-by: default avatarJens Axboe <axboe@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 00d6da9b

drivers/md/dm.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -768,6 +768,7 @@ static struct mapped_device *alloc_dev(unsigned int minor, int persistent) 
	md->queue->backing_dev_info.congested_fn = dm_any_congested;

	md->queue->backing_dev_info.congested_fn = dm_any_congested;

	md->queue->backing_dev_info.congested_data = md;

	md->queue->backing_dev_info.congested_data = md;

	blk_queue_make_request(md->queue, dm_request);

	blk_queue_make_request(md->queue, dm_request);

	blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY);

	md->queue->unplug_fn = dm_unplug_all;

	md->queue->unplug_fn = dm_unplug_all;

	md->queue->issue_flush_fn = dm_flush_all;

	md->queue->issue_flush_fn = dm_flush_all;