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Date:   Wed, 26 Jun 2019 09:26:53 +0300
From:   "Neftin, Sasha" <sasha.neftin@...el.com>
To:     Kai Heng Feng <kai.heng.feng@...onical.com>
Cc:     jeffrey.t.kirsher@...el.com,
        Anthony Wong <anthony.wong@...onical.com>,
        intel-wired-lan@...ts.osuosl.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: RX CRC errors on I219-V (6) 8086:15be

On 6/26/2019 09:14, Kai Heng Feng wrote:
> Hi Sasha
> 
> at 5:09 PM, Kai-Heng Feng <kai.heng.feng@...onical.com> wrote:
> 
>> Hi Jeffrey,
>>
>> We’ve encountered another issue, which causes multiple CRC errors and 
>> renders ethernet completely useless, here’s the network stats:
> 
> I also tried ignore_ltr for this issue, seems like it alleviates the 
> symptom a bit for a while, then the network still becomes useless after 
> some usage.
> 
> And yes, it’s also a Whiskey Lake platform. What’s the next step to 
> debug this problem?
> 
> Kai-Heng
CRC errors not related to the LTR. Please, try to disable the ME on your 
platform. Hope you have this option in BIOS. Another way is to contact 
your PC vendor and ask to provide NVM without ME. Let's start debugging 
with these steps.
> 
>>
>> /sys/class/net/eno1/statistics$ grep . *
>> collisions:0
>> multicast:95
>> rx_bytes:1499851
>> rx_compressed:0
>> rx_crc_errors:1165
>> rx_dropped:0
>> rx_errors:2330
>> rx_fifo_errors:0
>> rx_frame_errors:0
>> rx_length_errors:0
>> rx_missed_errors:0
>> rx_nohandler:0
>> rx_over_errors:0
>> rx_packets:4789
>> tx_aborted_errors:0
>> tx_bytes:864312
>> tx_carrier_errors:0
>> tx_compressed:0
>> tx_dropped:0
>> tx_errors:0
>> tx_fifo_errors:0
>> tx_heartbeat_errors:0
>> tx_packets:7370
>> tx_window_errors:0
>>
>> Same behavior can be observed on both mainline kernel and on your 
>> dev-queue branch.
>> OTOH, the same issue can’t be observed on out-of-tree e1000e.
>>
>> Is there any plan to close the gap between upstream and out-of-tree 
>> version?
>>
>> Kai-Heng
> 
> 

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