linux-kernel - Re: [RFC 1/3] Unified NMI delayed call mechanism

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Message-ID: <AANLkTilyV7XkZCsD5uNGhdTAGUUEvR5xIuvbwQGiMYvP@mail.gmail.com>
Date:	Sat, 19 Jun 2010 22:07:42 +0800
From:	huang ying <huang.ying.caritas@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Huang Ying <ying.huang@...el.com>,
	"Fr??d??ric Weisbecker" <fweisbec@...il.com>,
	Don Zickus <dzickus@...hat.com>, "H.PeterA" <hpa@...or.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC 1/3] Unified NMI delayed call mechanism

On Sat, Jun 19, 2010 at 6:53 PM, Ingo Molnar <mingo@...e.hu> wrote:
> The proper, generic approach would be to enable softirq notifications (on x86)
> from NMI contexts as well (it's actually possible without overhead),

Yes. I will do that. And I think self interrupt can be used as the
short-cut for soft_irq if available. The next soft_irq may be too late
if there is too few interrupts.

> and to
> extend user return notifiers with the logical next step: nmi return notifiers.
> If presented in such a form then those could use softirqs for atomic callbacks
> and per cpu kthreads for sleepable callbacks, etc.

NMI return notifiers fired in soft_irq?

Best Regards,
Huang Ying
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