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Date: Wed, 17 Jan 2018 22:58:36 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Miller <davem@davemloft.net>, Mike Galbraith <efault@gmx.de>,
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Subject: Re: [RFC 1/2] softirq: Defer net rx/tx processing to ksoftirqd
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On Wed, 17 Jan 2018, Linus Torvalds wrote:

> On Wed, Jan 17, 2018 at 1:49 PM, David Miller <davem@davemloft.net> 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.

Not really. There is nothing to see there.

Thanks,

	tglx