Date: Wed, 30 Dec 2015 00:02:13 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-amd64@FreeBSD.org Subject: [Bug 205706] Watchdog timeout on em driver under heavy traffic on a bridge configuration Message-ID: <bug-205706-6@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D205706 Bug ID: 205706 Summary: Watchdog timeout on em driver under heavy traffic on a bridge configuration Product: Base System Version: 11.0-CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: avilamarquezalvaro2015@gmail.com CC: freebsd-amd64@FreeBSD.org CC: freebsd-amd64@FreeBSD.org The em driver hangs with following error: em1: Watchdog timeout Queue[0]-- resetting Interface is RUNNING and ACTIVE em1: TX Queue 0 ------ em1: hw tdh =3D 379, hw tdt =3D 315 em1: Tx Queue Status =3D -2147483648 em1: TX descriptors avail =3D 64 em1: Tx Descriptors avail failure =3D 816926 em1: RX Queue 0 ------ em1: hw rdh =3D 149, hw rdt =3D 145 em1: RX discarded packets =3D 0 em1: RX Next to Check =3D 146 em1: RX Next to Refresh =3D 145 em1: link state changed to DOWN em1: link state changed to UP This is in a machine with dual Intel Gigabit NICs set up as a bridge with 11-CURRENT-amd64-20151217 base r292413. I suspect this will also happen if = only one of the NICs uses em driver. This happens under heavy traffic conditions (>=3D 10MiBytes/sec in both directions of the bridge) after 1-4 hours. Once the watchdog timeouts, the = link won't pass any more packets, it will detect cable disconn/conn. ifconfig down/ifconfig up won't help at all, a reboot is necessary. I tried the what is suggested here: bug #200221 (ifconfig -tso -vlanhwtso in both intfs) the watchdog doesn't timeout anymore but after a similar period= of time the link becomes unusable (a ping loses ~ 90% packets). This was also tested on 10.2-CURRENT with identical results Thanks --=20 You are receiving this mail because: You are on the CC list for the bug.=
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