Re: [RFC] Is lib/irq_poll still considered useful?

[Sebastian Andrzej Siewior]

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