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[PATCH 21/21] null_blk: Do not limit # of hardware queues to # of CPUs

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It is not responsibility of device driver to assume number of
hardware queues used. Let the block layer decide instead.

CC: Jens Axboe <axboe@kernel.dk>
CC: linux-nvme@lists.infradead.org
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
---
 drivers/block/null_blk.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index 1747040..8c5cf88 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -793,9 +793,7 @@ static int __init null_init(void)
 							nr_online_nodes);
 			submit_queues = nr_online_nodes;
 		}
-	} else if (submit_queues > nr_cpu_ids)
-		submit_queues = nr_cpu_ids;
-	else if (!submit_queues)
+	} else if (!submit_queues)
 		submit_queues = 1;
 
 	mutex_init(&lock);
-- 
1.8.3.1

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[PATCH RFC 00/21] blk-mq: Introduce combined hardware queues Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 13/21] blk-mq: Move hardware context init code into blk_mq_init_hctx() Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH RFC 19/21] blk-mq: Enable combined hardware queues Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 11/21] blk-mq: Move duplicating code to blk_mq_exit_hctx() Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 09/21] blk-mq: Cleanup a loop exit condition Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 08/21] blk-mq: Cleanup hardware context data node selection Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 21/21] null_blk: Do not limit # of hardware queues to # of CPUs Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH RFC 18/21] blk-mq: Enable tag numbers exceed hardware queue depth Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 14/21] blk-mq: Rework blk_mq_init_hctx() function Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 01/21] blk-mq: Fix memory leaks on a queue cleanup Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 15/21] blk-mq: Pair blk_mq_hctx_kobj_init() with blk_mq_hctx_kobj_put() Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 04/21] blk-mq: Do not limit number of queues to 'nr_cpu_ids' in allocations Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH 06/21] block: Remove redundant blk_mq_ops::map_queue() interface Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  [PATCH RFC 17/21] blk-mq: Introduce a 1:N hardware contexts Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 11:00 +0200
  Re: [PATCH RFC 00/21] blk-mq: Introduce combined hardware queues Christoph Hellwig <hch@infradead.org> - 2016-09-16 11:30 +0200
    Re: [PATCH RFC 00/21] blk-mq: Introduce combined hardware queues Alexander Gordeev <agordeev@redhat.com> - 2016-09-16 12:10 +0200
  Re: [PATCH RFC 00/21] blk-mq: Introduce combined hardware queues Keith Busch <keith.busch@intel.com> - 2016-09-16 23:00 +0200
    Re: [PATCH RFC 00/21] blk-mq: Introduce combined hardware queues Alexander Gordeev <agordeev@redhat.com> - 2016-09-19 12:40 +0200
      Re: [PATCH RFC 00/21] blk-mq: Introduce combined hardware queues Bart Van Assche <Bart.VanAssche@sandisk.com> - 2016-09-19 15:50 +0200
      Re: [PATCH RFC 00/21] blk-mq: Introduce combined hardware queues Keith Busch <keith.busch@intel.com> - 2016-09-20 16:50 +0200

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