netdev - Re: question about softirqs

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Date:	Wed, 13 May 2009 13:04:09 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	David Miller <davem@...emloft.net>, linuxppc-dev@...abs.org,
	paulus@...ba.org, netdev@...r.kernel.org
Subject: Re: question about softirqs

Andi Kleen wrote:

> network packets are normally processed by the network packet interrupt's
> softirq or alternatively in the NAPI poll loop.

If we have a high priority task, ksoftirqd may not get a chance to run.

My point is simply that the documentation says that softirqs are
processed on return from a syscall, and this is not necessarily the case.

Chris
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