Re: [RFC PATCH 2/4] softirq: Per vector deferment to workqueue

David Miller
2018-02-08T18:45:12Z

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 8 Feb 2018 18:44:52 +0100

> May I instead suggest to stick to ksoftirqd? So you run in softirq
> context (after return from IRQ) and if takes too long, you offload the
> vector to ksoftirqd instead. You may want to play with the metric on
> which you decide when you want switch to ksoftirqd / account how long a
> vector runs.

Having read over this stuff for the past few weeks this is how I feel
as well. Just make ksofbitrq do what we want (only execute the
overloaded softirq vectors).

The more I look at the workqueue stuff, the more complications and
weird behavioral artifacts we are getting for questionable gain.