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Omar Sandoval authored
blk_mq_update_nr_hw_queues() used to remap hardware queues, which is the behavior that drivers expect. However, commit 4e68a011 changed blk_mq_queue_reinit() to not remap queues for the case of CPU hotplugging, inadvertently making blk_mq_update_nr_hw_queues() not remap queues as well. This breaks, for example, NBD's multi-connection mode, leaving the added hardware queues unused. Fix it by making blk_mq_update_nr_hw_queues() explicitly remap the queues. Fixes: 4e68a011 ("blk-mq: don't redistribute hardware queues on a CPU hotplug event") Reviewed-by:
Keith Busch <keith.busch@intel.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Sagi Grimberg <sagi@grimberg.me> Signed-off-by:
Omar Sandoval <osandov@fb.com> Signed-off-by:
Jens Axboe <axboe@fb.com>
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