Re: main [so: 15] context, 7950X3D and RTL8251/8153 based Ethernet dongle: loss of state, example log information
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Date: Mon, 04 Mar 2024 20:39:39 UTC
On 04.03.2024 15:33, Jakob Alvermark wrote: > On 3/4/24 21:13, Alexander Motin wrote: >> On 04.03.2024 15:00, Poul-Henning Kamp wrote: >>>>> Nov 30 03:23:18 7950X3D-UFS kernel: ue0: link state changed to DOWN >>>>> Nov 30 03:23:18 7950X3D-UFS kernel: ue0: link state changed to UP >>>>> Nov 30 03:23:18 7950X3D-UFS kernel: ue0: link state changed to DOWN >>>>> Nov 30 03:23:18 7950X3D-UFS kernel: ue0: link state changed to UP >>>>> Nov 30 03:23:18 7950X3D-UFS kernel: ue0: link state changed to DOWN >>>>> Nov 30 03:23:18 7950X3D-UFS kernel: ue0: link state changed to UP >>> >>> I consistently had similar problems with my 0x17ef/0x3066 "ThinkPad >>> Thunderbolt 3 Dock MCU", but they went away after I forced it to >>> use the if_cdce driver instead with this quirk: >>> >>> /* This works much better with if_cdce than if_ure */ >>> USB_QUIRK(LENOVO, TBT3LAN, 0x0000, 0xffff, UQ_CFG_INDEX_1), >> >> AFAIK it is only a workaround. I saw it myself on number of different >> USB dongles and laptops, that USB starting experience some problems >> with multiple NIC queues and some other factors. IIRC the Realtek >> driver was much more stable once I limited it to one queue and some >> other hacks. IIRC if_cdce just has only one queue and other >> limitations, that not only makes it more stable, but also much >> slower. It would be good to understand what's wrong is there exactly, >> since IMHO it is a big problem now. Unfortunately HPS was unable to >> reproduce it on his laptop (that makes me wonder if is is specific to >> chipset(s) or thunderbolt?), so it ended nowhere so far. > > I have a Lenovo USB 3 dongle, so no thunderbolt. I also use USB3 dongles. But in my laptops the USB 3 ports are provided by Intel Thunderbolt controller, while in HPS' they were plain from USB3 controller. Though it may be just a coincidence. > USB ID 0x17ef/0x7205 > > rgephy1: <RTL8251/8153 1000BASE-T media interface> PHY 0 on miibus1 > > I tried using the cdce driver, it gives me < 100Mb/s, while the ure > driver gets > 500Mb/s Right, I saw about the same. -- Alexander Motin