netdev - Re: 2.6.24 BUG: soft lockup

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Message-Id: <20080328.162551.252642805.davem@davemloft.net>
Date:	Fri, 28 Mar 2008 16:25:51 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	mingo@...e.hu, Matheos.Worku@....COM, jesse.brandeburg@...el.com,
	jarkao2@...il.com, netdev@...r.kernel.org, hadi@...erus.ca
Subject: Re: 2.6.24 BUG: soft lockup - CPU#X

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Fri, 28 Mar 2008 19:29:28 +0800

> [NET]: Add preemption point in qdisc_run
> 
> The qdisc_run loop is currently unbounded and runs entirely
> in a softirq.  This is bad as it may create an unbounded softirq
> run.
> 
> This patch fixes this by calling need_resched and breaking out
> if necessary.
> 
> It also adds a break out if the jiffies value changes since that
> would indicate we've been transmitting for too long which starves
> other softirqs.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied, and I'll queue this up for -stable, thanks!
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