Re: [RFC PATCH] nvme-pci: adaptively poll completions on busy queues

Christoph Hellwig <[email protected]> Tue, 28 Jul 2026 06:44:09 +0200

Newsgroups	org.infradead.lists.linux-nvme,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On Tue, Jul 28, 2026 at 10:24:52AM +0800, changfengnan wrote:
> The patch showed 50 confirmed throughput improvements, with a median gain of 25.2%
> and a maximum gain of 63.0%. Only five cases showed confirmed regressions;

Can you drill down into the regression and figure out why they happen
and if we can mitigate them?  It would be nice if we could find a way
to avoid major regressions and enable the adaptive mode by default.