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Subject: Re: [Intel-wired-lan] [REGRESSION] e1000e heavy packet loss on Meteor Lake - 6.14.2 X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 4/21/2025 4:28 PM, Marek Marczykowski-Górecki wrote: > 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. > Dear Marek, Thank you for your detailed feedback and for providing the requested information. We have conducted extensive testing of this patch across multiple systems and have not observed any packet loss issues. Upon comparing the mentioned setups, we noted that while the LAN controller is similar, the CPU differs. We believe that the issue may be related to transitions in the CPU's low power states. Consequently, we kindly request that you disable the CPU low power state transitions in the S0 system state and verify if the issue persists. You can disable this in the kernel parameters on the command line with idle=poll. Please note that this command is intended for debugging purposes only, as it may result in higher power consumption. Please inform us if disabling the CPU low power states resolves the issue or if further investigation is required. As previously mentioned, this patch is critical for the operation of Meteor Lake LAN devices, and therefore, we are unable to revert it. Thank you for your cooperation.