netdev - Re: question about softirqs

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Message-ID: <20090513191354.GB19296@one.firstfloor.org>
Date:	Wed, 13 May 2009 21:13:54 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Chris Friesen <cfriesen@...tel.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	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

On Wed, May 13, 2009 at 01:04:09PM -0600, Chris Friesen wrote:
> 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.

In this case the next interrupt will also process them. It will just
go more slowly because interrupts limit the work compared to ksoftirqd.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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