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Date:   Wed, 1 Jul 2020 15:02:07 -0700
From:   Josh Hunt <>
To:     Cong Wang <>
Cc:, Paolo Abeni <>,
        Michael Zhivich <>,
        David Miller <>,
        John Fastabend <>,
        LKML <>,
        Linux Kernel Network Developers <>
Subject: Re: Packet gets stuck in NOLOCK pfifo_fast qdisc

On 7/1/20 12:58 PM, Cong Wang wrote:
> On Wed, Jul 1, 2020 at 9:05 AM Cong Wang <> wrote:
>> On Tue, Jun 30, 2020 at 2:08 PM Josh Hunt <> wrote:
>>> Do either of you know if there's been any development on a fix for this
>>> issue? If not we can propose something.
>> If you have a reproducer, I can look into this.
> Does the attached patch fix this bug completely?
> Thanks.

Hey Cong

Unfortunately we don't have a reproducer that would be easy to share, 
however your patch makes sense to me at a high-level. We will test and 
let you know if this fixes our problem.


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