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NVMe: Allocate queues only for online cpus

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The driver previously requested allocating queues for the total possible
number of CPUs so that blk-mq could rebalance these if CPUs were added
after initialization. The number of hardware contexts can now be changed
at runtime, so we only need to allocate the number of online queues
since we can add more later.

Suggested-by: Jeff Lien <jeff.lien@hgst.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2016-05-13 12:38:09 -06:00 committed by Jens Axboe
parent 24b9f0cf00
commit 2800b8e7d9
1 changed files with 1 additions and 1 deletions
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2
drivers/nvme/host/pci.c
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@ -1394,7 +1394,7 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
struct pci_dev *pdev = to_pci_dev(dev->dev); struct pci_dev *pdev = to_pci_dev(dev->dev);
int result, i, vecs, nr_io_queues, size; int result, i, vecs, nr_io_queues, size;
nr_io_queues = num_possible_cpus(); nr_io_queues = num_online_cpus();
result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues);
if (result < 0) if (result < 0)
return result; return result;