Date: Thu, 07 May 2015 12:43:50 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 200026] em driver reports "Watchdog timeout -- resetting" on vmware ESXi Message-ID: <bug-200026-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200026 Bug ID: 200026 Summary: em driver reports "Watchdog timeout -- resetting" on vmware ESXi Product: Base System Version: 10.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: nick@foobar.org the freebsd em driver periodically hangs when running in a VM on all versions of esxi after (but not including) build 799733 (ESXi 5.0 GA). The symptoms of the problem are that the freebsd vm drops traffic on the affected interface for a period of time. The kernel reports errors: Apr 22 19:12:08 xxxx kernel: em0: Watchdog timeout -- resetting Apr 25 07:38:18 xxxx kernel: em0: Watchdog timeout -- resetting Apr 27 23:29:35 xxxx kernel: em1: Watchdog timeout -- resetting Apr 29 18:03:29 xxxx kernel: em1: Watchdog timeout -- resetting May 5 05:28:38 xxxx kernel: em1: Watchdog timeout -- resetting FreeBSD 8/9 were particularly badly affected by this, to the point that the em driver was totally unusable on those versions when running as vm after esxi build 799733, i.e ~30% packet loss for pings. The intel em driver update in 10.0 helped quite a bit, and anecdotally the problem seems to be less bad on ESXi 6.0. Now the figure seems to be down at around 1-2% pktloss over extended periods of time. However it's still there on 10.1 with all recent versions of esxi, and prevents freebsd from being able to function properly as a router when using the em interface. The problem also affects freebsd derivatives (e.g. some versions of JunOS Firefly / vRR / vMX, etc). -- You are receiving this mail because: You are the assignee for the bug.
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