Date: Tue, 12 Sep 2006 16:03:24 +0200 From: Andre Oppermann <andre@freebsd.org> To: Ian FREISLICH <if@hetzner.co.za> Cc: current@freebsd.org, jfvogel@gmail.com Subject: Re: TSO, SMP and the em driver. Message-ID: <4506BE2C.1050903@freebsd.org> In-Reply-To: <E1GN5FA-00085C-CJ@hetzner.co.za> References: <E1GN5FA-00085C-CJ@hetzner.co.za>
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Ian FREISLICH wrote: > Hi > > I've noticed that after an apparently random period of time something > goes wierd with my networking. A tcpdump shows traffic is recieved, > but trussing a daemon (sshd for instance) shows the packets are not > making it that far. Also, no packets are transmitted either. > > Here's an ifconfig of the interface while it doesn't transmit or > recieve packets, note the OACTIVE: OACTIVE means the interface is stuck. This looks like a bug in the em(4) driver. I've copied Jack Vogel, the driver maintainer from Intel, into this email. -- Andre > em0: flags=8c43<UP,BROADCAST,RUNNING,OACTIVE,SIMPLEX,MULTICAST> mtu 1500 > options=3cb<RXCSUM,TXCSUM,VLAN_MTU,POLLING,VLAN_HWCSUM,TSO4,TSO6> > inet 41.204.193.40 netmask 0xfffffff0 broadcast 41.204.193.47 > ether 00:04:23:d4:12:2e > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > > If I disable and re-enable TSO, the interface cames back, but > probably because of an interface reset. It comes back without the > OACTIVE flag and then all works well for some time. > > Here's the pciconf output for the ethernet device. > > em0@pci3:4:0: class=0x020000 card=0x10798086 chip=0x10798086 rev=0x03 hdr=0x00 > vendor = 'Intel Corporation' > device = '82546EB Dual Port Gigabit Ethernet Controller' > class = network > subclass = ethernet > > So far, it hasn't happened again with TSO disabled over a period > where it happened twice. Let me know if there's any debugging I > can do for you. Interestingly, I have 4 more of these dual NICs > running on the same version of the source without ony problems, but > the working cards are on UP machines. > > Ian > > -- > Ian Freislich > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > >
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