From: Jens Axboe <axboe@suse.de>
Date: Tue, 10 Jan 2006 09:48:02 +0000 (+0100)
Subject: [PATCH] dm: don't enable bouncing by default
X-Git-Tag: v2.6.16-rc1~467
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=daef265f1590cf3e6de989d074041a280c82d58b;p=linux-2.6

[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: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 5c210b0a4c..097d1e5400 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -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_data = md;
 	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->issue_flush_fn = dm_flush_all;