netdev - Re: [PATCH take 2] pkt_sched: Fix qdisc_watchdog() vs. dev

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Message-Id: <20080821.051133.88846701.davem@davemloft.net>
Date:	Thu, 21 Aug 2008 05:11:33 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	herbert@...dor.apana.org.au, netdev@...r.kernel.org
Subject: Re: [PATCH take 2] pkt_sched: Fix qdisc_watchdog() vs.
 dev_deactivate() race

From: Jarek Poplawski <jarkao2@...il.com>
Date: Thu, 21 Aug 2008 05:49:11 +0000

> pkt_sched: Fix qdisc_watchdog() vs. dev_deactivate() race
> 
> dev_deactivate() can skip rescheduling of a qdisc by qdisc_watchdog()
> or other timer calling netif_schedule() after dev_queue_deactivate().
> We prevent this checking aliveness before scheduling the timer. Since
> during deactivation the root qdisc is available only as qdisc_sleeping
> additional accessor qdisc_root_sleeping() is created.
> 
> With feedback from Herbert Xu <herbert@...dor.apana.org.au>
> 
> Signed-off-by: Jarek Poplawski <jarkao2@...il.com>

Applied, thanks a lot Jarek.
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