netdev - Re: [PATCH] NET: Multiqueue network device support.

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Message-Id: <20070607.160035.00774597.davem@davemloft.net>
Date:	Thu, 07 Jun 2007 16:00:35 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hadi@...erus.ca
Cc:	auke-jan.h.kok@...el.com, jeff@...zik.org, kaber@...sh.net,
	peter.p.waskiewicz.jr@...el.com, netdev@...r.kernel.org,
	jesse.brandeburg@...el.com
Subject: Re: [PATCH] NET: Multiqueue network device support.

From: jamal <hadi@...erus.ca>
Date: Thu, 07 Jun 2007 18:54:08 -0400

> On Thu, 2007-07-06 at 15:44 -0700, David Miller wrote:
> > From: jamal <hadi@...erus.ca>
> > Date: Thu, 07 Jun 2007 17:57:25 -0400
> > 
> > > I empathize but take a closer look; seems mostly useless.
> > 
> > I thought E1000 still uses LLTX, and if so then multiple cpus can most
> > definitely get into the ->hard_start_xmit() in parallel.
> 
> AFAICS, only one CPU can dequeue from the qdisc i.e s/he who holds
> __LINK_STATE_QDISC_RUNNING is the only one who can call qdisc_restart
> and only s/he can enter ->hard_start_xmit().
> 
> Am i missing something?

That's right we fixed that the other week.
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