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null_blk: warning on ignored submit_queues param 

Let the user know when the number of submission queues are being
ignored.

Signed-off-by: Matias Bjorling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Matias Bjorling 2013-12-18 13:41:44 +01:00 committed by Jens Axboe
parent 2d263a7856
commit d15ee6b1a4
1 changed files with 5 additions and 2 deletions
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7
drivers/block/null_blk.c
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@ -590,9 +590,12 @@ static int __init null_init(void)
}
#endif
if (queue_mode == NULL_Q_MQ && use_per_node_hctx)
if (queue_mode == NULL_Q_MQ && use_per_node_hctx) {
if (submit_queues > 0)
pr_warn("null_blk: submit_queues param is set to %u.",
nr_online_nodes);
submit_queues = nr_online_nodes;
else if (submit_queues > nr_cpu_ids)
} else if (submit_queues > nr_cpu_ids)
submit_queues = nr_cpu_ids;
else if (!submit_queues)
submit_queues = 1;