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

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Message-ID: <20080911114502.GA22698@gondor.apana.org.au>
Date:	Thu, 11 Sep 2008 21:45:02 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	jarkao2@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH take 2] pkt_sched: Fix qdisc_watchdog() vs.
	dev_deactivate() race

On Thu, Sep 11, 2008 at 04:42:55AM -0700, David Miller wrote:
>
> This gets us back to the whole qdisc->ops->peek() discussion :)

That just proves it's a good idea :)

> And we don't have the qdisc lock here, taking it is undesirable,
> and if we do take it we have to transfer that lock down into
> __qdisc_run() which means adjusting all the other __qdisc_run()
> callers.

Last I checked qdisc_run did run under the root lock...

Cheers,
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