linux-kernel - Re: [git patches] net driver updates

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Message-Id: <20080220.214651.235108740.davem@davemloft.net>
Date:	Wed, 20 Feb 2008 21:46:51 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	krkumar2@...ibm.com
Cc:	divy@...lsio.com, jeff@...zik.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [git patches] net driver updates

From: Krishna Kumar2 <krkumar2@...ibm.com>
Date: Thu, 21 Feb 2008 09:13:49 +0530

> Hi Divy,
> 
> > > Explain why, so I can include it in the changelog please...
> >
> > Hi Jeff,
> >
> > The first part of the patch removes the !netif_queue_stopped(dev).
> > It opens the race discussed a while ago between Stephen hemminger and
> > David Miller:
> > http://marc.info/?l=linux-netdev&m=113383224512427&w=2
> 
> I feel this race cannot happen anymore. I think the fix for that race was
> to introduce the
> __LINK_STATE_QDISC_RUNNING bit thus eliminating any races between CPU's. If
> one
> CPU has called xmit, the other CPU will enqueue skbs (by holding the
> queue_lock) and
> exit from qdisc_run since it finds the bit set already.

And the race is talking about LLTX, which S2IO doesn't use as
far as I can tell.
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