netdev - Re: [PATCH] pkt_sched: Control group classifier

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Date:	Sun, 19 Oct 2008 19:00:33 +0200
From:	Thomas Graf <tgraf@...g.ch>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH] pkt_sched: Control group classifier

* Andi Kleen <andi@...stfloor.org> 2008-10-18 07:38
> On Fri, Oct 17, 2008 at 10:09:16PM +0200, Thomas Graf wrote:
> > * Andi Kleen <andi@...stfloor.org> 2008-10-17 20:32
> > > > softirq_count() simply counts the levels of bh disable.
> > > 
> > > softirqs always have bh disabled.  So it's always true inside them.
> > > And you should know what _bh locks you hold.
> > 
> > I actually tried "softirq_count() == SOFTIRQ_OFFSET" to see if the
> 
> softirq_count() > 0 should work.

No, it doesn't. User context calls to dev_queue_xmit() will also
disable bh and thus softirq_count() will always be > 0.
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