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blk-mq: don't bounce by default

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For historical reasons we default to bouncing highmem pages for all block
queues.  But the blk-mq drivers are easy to audit to ensure that we don't
need this - scsi and mtip32xx set explicit limits and everyone else doesn't
have any particular ones.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2017-06-19 09:26:24 +02:00
committed by Jens Axboe
parent 0b0bcacc3b
commit 46685d1a95
3 changed files with 0 additions and 11 deletions
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block/blk-mq.c
-5
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@@ -2349,11 +2349,6 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
blk_queue_make_request(q, blk_mq_make_request);
/*
* by default assume old behaviour and bounce for any highmem page
*/
blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
/*
* Do this after blk_queue_make_request() overrides it...
*/