netdev - Re: bnx2_poll panicking kernel

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Message-ID: <20080714172055.GA2638@ami.dom.local>
Date:	Mon, 14 Jul 2008 19:20:55 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	David Miller <davem@...emloft.net>, joy@...uzijast.net,
	mchan@...adcom.com, billfink@...dspring.com,
	bhutchings@...arflare.com, netdev@...r.kernel.org,
	mirrors@...ian.org, devik@....cz
Subject: Re: bnx2_poll panicking kernel

On Mon, Jul 14, 2008 at 05:27:29PM +0200, Patrick McHardy wrote:
> Jarek Poplawski wrote:
>> Jarek Poplawski wrote, On 07/12/2008 11:49 AM:
>>
>>> This isn't correct: htb_activate() needs cl->un.leaf.q->q.qlen > 0, and
>>> only NET_XMIT_SUCCESS can guarantee this.
>>
>>
>> ...Actually, it looks like even NET_XMIT_SUCCESS can't guarantee this
>> (when returned after TC_ACT_QUEUED or TC_ACT_STOLEN), so additional qlen
>> test is needed here.
>
> The TC action code translation needs to be fixed instead.
>
> I didn't manage to work on this this weekend as I intended, but
> I'll take care of it soon unless someone beats me to it.

IMHO, since this TC_ACT_ issue looks quite rare, David's patch, with
"htb_activate()" moved to the last "if (ret == NET_XMIT_SUCCESS)"
blocks, looks like necessary.

BTW, I wonder how Josip's testing?

Jarek P.
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