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Date:      Sun, 03 May 2020 17:59:21 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 205706] Watchdog timeout on em driver under heavy traffic on a bridge configuration
Message-ID:  <bug-205706-7501-Bcfl6OkGlf@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-205706-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-205706-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D205706

daulton@tetmail.ca changed:

           What    |Removed                     |Added
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                 CC|                            |daulton@tetmail.ca

--- Comment #10 from daulton@tetmail.ca ---
I receive the same problem except on FreeNAS-11.3-U2. The problem started a=
 few
updates ago, sometime around 11.2-U6. I have been using the same system sin=
ce
FreeNAS 9.10 and it did not have this problem back then. The motherboard is=
 a
Supermicro X8SIA which has dual onboard Intel 82574L Gigabit Ethernet
Controllers.

I noticed from my Zabbix logs this issue mostly seems to happen during or a=
fter
my backups run to the system, which occur over NFS. This is a lot of sustai=
ned
traffic from two hypervisors backing up all guest hosts.

In the logs I get the same sort of error others shared:

Apr 18 19:18:42 freenas em0: Watchdog timeout Queue[0]-- resetting
Apr 18 19:18:42 freenas Interface is RUNNING and ACTIVE
Apr 18 19:18:42 freenas em0: TX Queue 0 ------
Apr 18 19:18:42 freenas em0: hw tdh =3D 0, hw tdt =3D 905
Apr 18 19:18:42 freenas em0: Tx Queue Status =3D -2147483648
Apr 18 19:18:42 freenas em0: TX descriptors avail =3D 119
Apr 18 19:18:42 freenas em0: Tx Descriptors avail failure =3D 0
Apr 18 19:18:42 freenas em0: RX Queue 0 ------
Apr 18 19:18:42 freenas em0: hw rdh =3D 0, hw rdt =3D 1023
Apr 18 19:18:42 freenas em0: RX discarded packets =3D 0
Apr 18 19:18:42 freenas em0: RX Next to Check =3D 0
Apr 18 19:18:42 freenas em0: RX Next to Refresh =3D 0

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