Re: [PATCH 4/6] blk-mq: avoid to map CPU into stale hw queue
From: Christoph Hellwig <hch@lst.de>
Date: 2017-12-12 14:12:44
Also in:
linux-nvme
On Tue, Dec 12, 2017 at 07:02:30PM +0800, Ming Lei wrote:
blk_mq_pci_map_queues() may not map one CPU into any hw queue, but its previous map isn't cleared yet, and may point to one stale hw queue index. This patch fixes the following issue by clearing the mapping table before setting it up in blk_mq_pci_map_queues().
This needs to be done in the caller intead of the transport specific queue map helpers.