netdev - Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl

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Message-ID: <20080812103817.GA6794@ff.dom.local>
Date:	Tue, 12 Aug 2008 10:38:17 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().

On Tue, Aug 12, 2008 at 01:15:10AM -0700, David Miller wrote:
...
> The synchronization object is the qdisc.  So we can't resample the
> qdisc after scheduling it, because then the qdisc attached to the
> netdev_queue can change and we'd be holding the root lock for
> the wrong qdisc object.

If you mean net_tx_action() this looks like we would get a root lock
of a current qdisc, just like seen in dev_queue_xmit() at the moment,
so I'm still looking for a clue, what could be wrong with this...

Jarek P.
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