Re: [RFC 1/2] softirq: Defer net rx/tx processing to ksoftirqd context

[Linus Torvalds]

On Wed, Jan 17, 2018 at 1:49 PM, David Miller <davem@xxxxxxxxxxxxx> wrote:
>
>> That said, this made me wonder a bit. I wonder how bounded the latency
>> is for raising a softirq from process context. We only _check_ the
>> softirq on the last hardirq exit, I think.
>
> System call return checks it, otherwise this situation would be
> completely bolixed.

That's what I thought too. But then I went and looked, and I can't find it.

But you're probably right, and I just missed it.

              Linus