[Bug 200420] [igb] igb0: Watchdog timeout -- resetting

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200420

--- Comment #2 from arcadiy at ivanovy.net ---
Spoke too soon, disabling MSI-X seems to help only marginally:

Jun 16 13:29:49 <kern.crit> fw1 kernel: igb1: Watchdog timeout -- resetting
Jun 16 13:29:49 <kern.crit> fw1 kernel: igb1: Queue(846295657) tdh =
-1249464976, hw tdt = 589458993
Jun 16 13:29:49 <kern.crit> fw1 kernel: igb1: TX(846295657) desc avail = 0,Next
TX to Clean = 0
Jun 16 13:29:49 <kern.notice> fw1 kernel: igb1: link state changed to DOWN
Jun 16 13:29:53 <kern.notice> fw1 kernel: igb1: link state changed to UP
Jun 16 13:29:53 <user.notice> fw1 devd: Executing '/etc/rc.d/dhclient
quietstart igb1'
Jun 16 13:34:26 <kern.crit> fw1 kernel: igb1: Watchdog timeout -- resetting
Jun 16 13:34:26 <kern.crit> fw1 kernel: igb1: Queue(846295657) tdh =
-1249464976, hw tdt = 589458993
Jun 16 13:34:26 <kern.crit> fw1 kernel: igb1: TX(846295657) desc avail = 0,Next
TX to Clean = 0
Jun 16 13:34:26 <kern.notice> fw1 kernel: igb1: link state changed to DOWN
Jun 16 13:34:31 <kern.notice> fw1 kernel: igb1: link state changed to UP
Jun 16 13:34:31 <user.notice> fw1 devd: Executing '/etc/rc.d/dhclient
quietstart igb1'

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