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    SubjectRe: [PATCH] nvme: Acknowledge completion queue on each iteration
    On Mon, Jul 17, 2017 at 06:36:23PM -0400, Sinan Kaya wrote:
    > Code is moving the completion queue doorbell after processing all completed
    > events and sending callbacks to the block layer on each iteration.
    >
    > This is causing a performance drop when a lot of jobs are queued towards
    > the HW. Move the completion queue doorbell on each loop instead and allow new
    > jobs to be queued by the HW.

    That doesn't make sense. Aggregating doorbell writes should be much more
    efficient for high depth workloads.

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