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Re: [PATCH] hw/nvme: reenable cqe batching


From: Keith Busch
Subject: Re: [PATCH] hw/nvme: reenable cqe batching
Date: Thu, 20 Oct 2022 10:37:49 -0600

On Thu, Oct 20, 2022 at 01:35:38PM +0200, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Commit 2e53b0b45024 ("hw/nvme: Use ioeventfd to handle doorbell
> updates") had the unintended effect of disabling batching of CQEs.
> 
> This patch changes the sq/cq timers to bottom halfs and instead of
> calling nvme_post_cqes() immediately (causing an interrupt per cqe), we
> defer the call.

Nice change, looks good! Timers never did seem to be the best fit for
this.

Reviewed-by: Keith Busch <kbusch@kernel.org>



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