netdev - Re: [RFC PATCH 00/12] Implement XDP bpf

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Date:   Mon, 10 Jul 2017 17:59:17 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>,
        David Miller <davem@...emloft.net>
CC:     netdev@...r.kernel.org, andy@...yhouse.net, daniel@...earbox.net,
        ast@...com, alexander.duyck@...il.com, bjorn.topel@...el.com,
        jakub.kicinski@...ronome.com, ecree@...arflare.com,
        sgoutham@...ium.com, Yuval.Mintz@...ium.com, saeedm@...lanox.com
Subject: Re: [RFC PATCH 00/12] Implement XDP bpf_redirect vairants

On 07/10/2017 11:30 AM, Jesper Dangaard Brouer wrote:
> On Sat, 8 Jul 2017 21:06:17 +0200
> Jesper Dangaard Brouer <brouer@...hat.com> wrote:
> 
>> On Sat, 08 Jul 2017 10:46:18 +0100 (WEST)
>> David Miller <davem@...emloft.net> wrote:
>>
>>> From: John Fastabend <john.fastabend@...il.com>
>>> Date: Fri, 07 Jul 2017 10:48:36 -0700
>>>   
>>>> On 07/07/2017 10:34 AM, John Fastabend wrote:    
>>>>> This series adds two new XDP helper routines bpf_redirect() and
>>>>> bpf_redirect_map(). The first variant bpf_redirect() is meant
>>>>> to be used the same way it is currently being used by the cls_bpf
>>>>> classifier. An xdp packet will be redirected immediately when this
>>>>> is called.    
>>>>
>>>> Also other than the typo in the title there ;) I'm going to CC
>>>> the driver maintainers working on XDP (makes for a long CC list but)
>>>> because we would want to try and get support in as many as possible in
>>>> the next merge window.
>>>>
>>>> For this rev I just implemented on ixgbe because I wrote the
>>>> original XDP support there. I'll volunteer to do virtio as well.    
>>>
>>> I went over this series a few times and it looks great to me.
>>> You didn't even give me some coding style issues to pick on :-)  
>>
>> We (Daniel, Andy and I) have been reviewing and improving on this
>> patchset the last couple of weeks ;-).  We had some stability issues,
>> which is why it wasn't published earlier. My plan is to test this
>> latest patchset again, Monday and Tuesday. I'll try to assess stability
>> and provide some performance numbers.
> 
> 
> Damn, I though it was stable, I have been running a lot of performance
> tests, and then this just happened :-(

Thanks, I'll take a look through the code and see if I can come up with
why this might happen. I haven't hit it on my tests yet though.

.John