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Cc:     tim@timhiggins.com,
        "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: AX200 crash on udp upload, cannot restart
To:     Luca Coelho <luca@coelho.fi>,
        Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>,
        Ben Greear <greearb@candelatech.com>
References: <08f29d02-2fcf-e779-6fc0-ea7a9d4e59b6@candelatech.com>
 <20191008073330.7nuwzwpwgzgjfswm@bars>
 <df659853170ddf7a309c2f132eb749a35fbd8caf.camel@coelho.fi>
From:   Tim Higgins <tim@timhiggins.com>
Message-ID: <d603172d-5642-13d4-ece7-301d9525351e@timhiggins.com>
Date:   Tue, 8 Oct 2019 07:11:41 -0700
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This is not just a UDP issue. I've seen crashes and/or throughput drops running 
TCP/IP uplink iperf3 traffic to test maximum bandwidth.

On 10/8/2019 12:58 AM, Luca Coelho wrote:
> On Tue, 2019-10-08 at 07:33 +0000, Sergey Matyukevich wrote:
>>> We have a system with several of the AX200 NICs in it, kernel is 5.2.14+.  We ran a udp upload
>>> test of 10Mbps across all radios, and after about 10 minutes one of the radios crashed and could
>>> not be restarted.  The others continued to run so far.
>>>
>>> I will open a bug in the kernel bug tracker.
>>
>> Hello Ben,
>>
>> We observed similar issues in our tests as well. All the details
>> have been described in kernel bugzilla issue:
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.kernel.org_show-5Fbug.cgi-3Fid-3D205061&d=DwIFAg&c=MHZppzMdXMt3JYjCV71UsQ&r=RFH8dgrFzz0_hnNXpEl_u3TZqD-B6kYLzfvbDuCKw3U&m=opeh64GEVevn0071vriL-kH2B_orc25yacBPa3YdgLI&s=CKuyBZ0VdAQocDiZGOIDyDC6GG9w4E7OikmGvzblazU&e=
> 
> Thanks for the reports!
> 
> Ben also added a bug in bugzilla[1], let's use that one for tracking
> (I'll mark Sergey's as a duplicate).
> 
> This is a know issue and our PHY team is already working on it
> internally.  I don't have much more details at the moment, but I'll
> update the bugzilla entry as soon as we know more.
> 
> 
> --
> Cheers,
> Luca.
>