Messages in this thread | | | Date | Fri, 5 Aug 2011 13:25:58 +0200 | From | Jiri Pirko <> | Subject | Re: [forcedeth bug] Re: [GIT] Networking |
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Fri, Aug 05, 2011 at 12:29:03PM CEST, mingo@elte.hu wrote: > >* Jiri Pirko <jpirko@redhat.com> wrote: > >> Thu, Aug 04, 2011 at 11:53:54PM CEST, mingo@elte.hu wrote: >> > >> >* Ingo Molnar <mingo@elte.hu> wrote: >> > >> >> 0891b0e08937: forcedeth: fix vlans >> > >> >Hm, forcedeth is still giving me trouble even on latest -git that has >> >the above fix included. >> > >> >The symptom is a stuck interface, no packets in. There's a frame >> >error RX packet: >> > >> > [root@mercury ~]# ifconfig eth0 >> > eth0 Link encap:Ethernet HWaddr 00:13:D4:DC:41:12 >> > inet addr:10.0.1.13 Bcast:10.0.1.255 Mask:255.255.255.0 >> > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 >> > RX packets:0 errors:1 dropped:0 overruns:0 frame:1 >> > TX packets:531 errors:0 dropped:0 overruns:0 carrier:0 >> > collisions:0 txqueuelen:1000 >> > RX bytes:0 (0.0 b) TX bytes:34112 (33.3 KiB) >> > Interrupt:35 >> > >> >Weirdly enough a defconfig x86 bootup works just fine - it's certain >> >.config combinations that trigger the bug. I've attached such a >> >config. >> > >> >Note that at least once i've observed a seemingly good kernel going >> >'bad' after a couple of minutes uptime. I've also observed >> >intermittent behavior - apparent lost packets and a laggy network. >> > >> >I have done 3 failed attempts to bisect it any further - i got to the >> >commit that got fixed by: >> > >> > 0891b0e08937: forcedeth: fix vlans >> > >> >... but that's something we already knew. >> > >> >Let me know if there's any data i can provide to help debug this >> >problem. >> > >> >Thanks, >> > >> > Ingo >> >> Interesting. >> >> Is DEV_HAS_VLAN set in id->driver_data (L5344) ? > >How do i tell that without hacking the driver?
look in dmesg for line like: "forcedeth 0000:00:08.0: highdma csum vlan pwrctl mgmt gbit lnktim msi desc-v3"
if "vlan" is there, DEV_HAS_VLAN is set
> >> If so, would you try to disable both rx an tx vlan accel using >> ethtool and see if it helps? > >Should i do that when the device is in a stuck state and see whether >it recovers?
Yes.
> >Also, please provide the exact ethtool command sequences i should >try, this makes it easier for me to test exactly what you want me to >test.
ethtool -K eth0 txvlan off rxvlan off
> >Thanks, > > Ingo
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