netdev - Re: [PATCH net] net, sched: fix soft lockup in tc

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Message-ID: <585C6003.9050806@iogearbox.net>
Date:   Fri, 23 Dec 2016 00:21:39 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     John Fastabend <john.fastabend@...il.com>,
        David Miller <davem@...emloft.net>
CC:     xiyou.wangcong@...il.com, shahark@...lanox.com,
        gerlitz.or@...il.com, roid@...lanox.com, jiri@...lanox.com,
        netdev@...r.kernel.org
Subject: Re: [PATCH net] net, sched: fix soft lockup in tc_classify

On 12/22/2016 06:50 PM, John Fastabend wrote:
> On 16-12-22 08:53 AM, David Miller wrote:
>> From: Daniel Borkmann <daniel@...earbox.net>
>> Date: Wed, 21 Dec 2016 22:07:48 +0100
>>
>>> Ok, you mean for net. In that case I prefer the smaller sized fix to
>>> be honest. It also covers everything from the point where we fetch
>>> the chain via cops->tcf_chain() to the end of the function, which is
>>> where most of the complexity resides, and only the two mentioned
>>> commits do the relock, so as a fix I think it's fine as-is. As
>>> mentioned, if there's need to refactor tc_ctl_tfilter() net-next
>>> would be better, imho.
>>
>> Please, can you two work towards an agreement as to what fix should
>> go in at this time?
>>
>> Thanks.
>
> Thanks for fixing this!
>
> I have a slight preference to push this patch into net as its been
> tested already by Shahar and is not particularly invasive. Then for
> net-next do a larger cleanup to get rid of some of the complexity per
> Cong's suggestion.

My preference as well, thanks.