nvme-pci: use block layer helpers to calculate num of queues
authorDaniel Wagner <wagi@kernel.org>
Tue, 17 Jun 2025 13:43:25 +0000 (15:43 +0200)
committerJens Axboe <axboe@kernel.dk>
Tue, 1 Jul 2025 16:24:19 +0000 (10:24 -0600)
commit4082c98c1fefd276b34ba411ac59c50b336dfbb1
tree3e742519c1770f121c4cace0b04b3e5f6c591a9c
parent3f27c1de5df265f9d8edf0cc5d75dc92e328484a
nvme-pci: use block layer helpers to calculate num of queues

The calculation of the upper limit for queues does not depend solely on
the number of possible CPUs; for example, the isolcpus kernel
command-line option must also be considered.

To account for this, the block layer provides a helper function to
retrieve the maximum number of queues. Use it to set an appropriate
upper queue number limit.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20250617-isolcpus-queue-counters-v1-3-13923686b54b@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/nvme/host/pci.c