Messages in this thread | | | Date | Fri, 1 Oct 2021 08:41:10 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [RFC] Is lib/irq_poll still considered useful? |
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On 2021-10-01 05:24:49 [+0100], Christoph Hellwig wrote: > On Thu, Sep 30, 2021 at 12:56:05PM +0200, Sebastian Andrzej Siewior wrote: > > Is there a reason for the remaining user of irq_poll to keep using it? > > At least for RDMA there are workloads where the latency difference > matters. That's why we added both the irq_poll and workqueue mode > to thew new CQ API a few years ago.
Would it work for them to move to threaded interrupts or is the NAPI like behaviour (delay after a while to the next jiffy) the killer feature?
Sebastian
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