linux-kernel - RE: About the fix "e1000e: workaround for packet drop on 82579 at 100Mbps (commit 0ed013e28fe853244f4972cf18d8e2bd62eeb8fc)"

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Message-ID: <E0862362F1FF584BBCF7C4EA592A20C412CB1E13@orsmsx509.amr.corp.intel.com>
Date:	Thu, 3 Nov 2011 17:28:29 -0700
From:	"Allan, Bruce W" <bruce.w.allan@...el.com>
To:	"Artem S. Tashkinov" <t.artem@...os.com>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>
Subject: RE: About the fix "e1000e: workaround for packet drop on 82579 at
 100Mbps (commit 0ed013e28fe853244f4972cf18d8e2bd62eeb8fc)"

>-----Original Message-----
>From: Artem S. Tashkinov [mailto:t.artem@...os.com]
>Sent: Wednesday, November 02, 2011 5:09 AM
>To: Allan, Bruce W; Kirsher, Jeffrey T
>Cc: linux-kernel@...r.kernel.org
>Subject: About the fix "e1000e: workaround for packet drop on 82579 at 100Mbps
>(commit 0ed013e28fe853244f4972cf18d8e2bd62eeb8fc)"
>
>Hello,
>
>I'm now running Linux 3.0.8 and I still see this issue:
>
>$ ifconfig eth0
>
>eth0   Link encap:Ethernet  HWaddr f4:6d:04:39:XX:XX
>          inet addr:192.168.0.1  Bcast:192.168.0.255  Mask:255.255.255.0
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:123911 errors:0 dropped:386 overruns:0 frame:0
>          TX packets:122441 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:1000
>          RX bytes:96626066 (92.1 MiB)  TX bytes:15191495 (14.4 MiB)
>          Interrupt:18 Memory:fb500000-fb520000
>
>More about this particular onboard NIC (motherboard ASUS P8P67 PRO Rev 3.0)
>
># lspci -vvv -s 00:19.0
>
>00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection
>(rev 05)
>        Subsystem: ASUSTeK Computer Inc. Device 849c
>        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>Stepping- SERR- FastB2B- DisINTx+
>        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
><MAbort- >SERR- <PERR- INTx-
>        Latency: 0
>        Interrupt: pin A routed to IRQ 49
>        Region 0: Memory at fb500000 (32-bit, non-prefetchable) [size=128K]
>        Region 1: Memory at fb528000 (32-bit, non-prefetchable) [size=4K]
>        Region 2: I/O ports at f040 [size=32]
>        Capabilities: [c8] Power Management version 2
>                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-
>,D3hot+,D3cold+)
>                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME-
>        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>                Address: 00000000fee0100c  Data: 416a
>        Capabilities: [e0] PCI Advanced Features
>                AFCap: TP+ FLR+
>                AFCtrl: FLR-
>                AFStatus: TP-
>        Kernel driver in use: e1000e
>        Kernel modules: e1000e
>
># ethtool eth0
>Settings for eth0:
>        Supported ports: [ TP ]
>        Supported link modes:   10baseT/Half 10baseT/Full
>                                100baseT/Half 100baseT/Full
>                                1000baseT/Full
>        Supports auto-negotiation: Yes
>        Advertised link modes:  10baseT/Half 10baseT/Full
>                                100baseT/Half 100baseT/Full
>                                1000baseT/Full
>        Advertised pause frame use: No
>        Advertised auto-negotiation: Yes
>        Speed: 100Mb/s
>        Duplex: Full
>        Port: Twisted Pair
>        PHYAD: 2
>        Transceiver: internal
>        Auto-negotiation: on
>        MDI-X: off
>        Supports Wake-on: pumbg
>        Wake-on: d
>        Current message level: 0x00000001 (1)
>                               drv
>        Link detected: yes
>
>I'm not absolutely certain about the quality of equipment I'm connected to - so
>I'd like to know how can I
>remove it out of equation.
>
>My Internet connection seemingly works this way:
>
>My_PC -> 16-port unmanageable Ethernet switch -> Cisco Ethernet switch -> Cisco
>PPPoE concentrator (the
>first device I can ping via PPPoE connection)
>
>Best wishes,
>
>Artem

Your issue might not be the same as the one fixed by the subject patch.
Please file a bug at http://e1000.sf.net with the information you have
provided in this email as well as a description of the type of traffic is
going on when you see the packet drops happen.

Thanks,
Bruce.