netdev - Re: [Intel-wired-lan] [REGRESSION] e1000e heavy packet loss on Meteor Lake

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Message-ID: <aAZH7fpaGf7hvX6T@mail-itl>
Date: Mon, 21 Apr 2025 15:28:13 +0200
From: Marek Marczykowski-Górecki <marmarek@...isiblethingslab.com>
To: "Lifshits, Vitaly" <vitaly.lifshits@...el.com>
Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Tony Nguyen <anthony.l.nguyen@...el.com>, netdev@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org, regressions@...ts.linux.dev,
	stable@...r.kernel.org, Sasha Levin <sashal@...nel.org>
Subject: Re: [Intel-wired-lan] [REGRESSION] e1000e heavy packet loss on
 Meteor Lake - 6.14.2

On Mon, Apr 21, 2025 at 03:19:12PM +0200, Marek Marczykowski-Górecki wrote:
> On Mon, Apr 21, 2025 at 03:44:02PM +0300, Lifshits, Vitaly wrote:
> > 
> > 
> > On 4/16/2025 3:43 PM, Marek Marczykowski-Górecki wrote:
> > > On Wed, Apr 16, 2025 at 03:09:39PM +0300, Lifshits, Vitaly wrote:
> > > > Can you please also share the output of ethtool -i? I would like to know the
> > > > NVM version that you have on your device.
> > > 
> > > driver: e1000e
> > > version: 6.14.1+
> > > firmware-version: 1.1-4
> > > expansion-rom-version:
> > > bus-info: 0000:00:1f.6
> > > supports-statistics: yes
> > > supports-test: yes
> > > supports-eeprom-access: yes
> > > supports-register-dump: yes
> > > supports-priv-flags: yes
> > > 
> > 
> > Your firmware version is not the latest, can you check with the board
> > manufacturer if there is a BIOS update to your system?
> 
> I can check, but still, it's a regression in the Linux driver - old
> kernel did work perfectly well on this hw. Maybe new driver tries to use
> some feature that is missing (or broken) in the old firmware?

A little bit of context: I'm maintaining the kernel package for a Qubes
OS distribution. While I can try to update firmware on my test system, I
have no influence on what hardware users will use this kernel, and
which firmware version they will use (and whether all the vendors
provide newer firmware at all). I cannot ship a kernel that is known
to break network on some devices.

> > Also, you mentioned that on another system this issue doesn't reproduce, do
> > they have the same firmware version?
> 
> The other one has also 1.1-4 firmware. And I re-checked, e1000e from
> 6.14.2 works fine there.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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