Re: [RFC PATCH 0/3] nvme-pci: yield completions under scheduler pressure

[Naman Jain]

On 10/9/2026 11:24 AM, Michael Kelley wrote:
> From: Naman Jain <namjain@xxxxxxxxxxxxxxxxxxx> Sent: Thursday, October 8, 2026 10:06 PM
> > On systems with several fast NVMe controllers, completion interrupts can
> > keep returning to the same CPUs faster than scheduled work can run. Each
> > handler may drain only a small number of completions, but the combined
> > interrupt stream can still prevent scheduler and watchdog progress.
>
> See this recent proposal [1] that sounds like it is addressing the same or a
> similar issue. And there is this [2] more global approach. It's worthwhile to read
> through the discussion on both threads. I haven't done a detailed comparison
> of either vs. your proposal.
>
> Michael
>
> [1] https://lore.kernel.org/linux-nvme/20260818033846.53790-1-changfengnan@xxxxxxxxxxxxx/
> [2] https://lore.kernel.org/lkml/20260819124341.4185621-1-lrizzo@xxxxxxxxxx/


Thanks for sharing these Michael. I'll check more on these, and try it out.

Regards,
Naman