+linux-pci
Hi Sasha,
at 6:49 PM, Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> wrote:
at 14:26, Neftin, Sasha <sasha.neftin@xxxxxxxxx> wrote:
On 6/26/2019 09:14, Kai Heng Feng wrote:
Hi Sasha
at 5:09 PM, Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> 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.
According to ODM, the ME can be physically disabled by a jumper.
But after disabling the ME the same issue can still be observed.
We’ve found that this issue doesn’t happen to SATA SSD, it only happens
when NVMe SSD is in use.
Here are the steps:
- Disable NVMe ASPM, issue persists
- modprobe -r e1000e && modprobe e1000e, issue doesn’t happen
- Enabling NVMe ASPM, issue doesn’t happen
As long as NVMe ASPM gets enabled after e1000e gets loaded, the issue
doesn’t happen.
Do you have any idea how those two are intertwined together?
Kai-Heng
Kai-Heng
/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
