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

[Christoph Hellwig]

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.