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

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Date:	Thu, 14 Aug 2008 18:33:36 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().

On Thu, Aug 14, 2008 at 08:31:27AM +0000, Jarek Poplawski wrote:
>
> I'm not sure of your point... This patch is only to fix my yesterday's
> doubt #1, and it doesn't introduce, I hope, any new live-lock
> vulnerabity. So, if you mean doubt #2, there is needed a separate
> patch, but I'm not sure there is a need to add a flag. I've thougt
> about a counter in a Qdisc for consecutive requeues with
> netif_schedule, so we could break after some limit. Of course, your
> idea could be simpler and better, but if I could only see some code...

What I mean is the extremely unlikely scenario of net_tx_action
always failing on trylock because dev_deactivate has grabbed the
lock to check whether net_tx_action has completed.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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