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Date: Wed, 22 Apr 2015 08:58:33 +0200
From: Andre Albsmeier <Andre.Albsmeier@siemens.com>
To: Mike Tancsa <mike@sentex.net>
Cc: Andre Albsmeier <Andre.Albsmeier@siemens.com>, freebsd-net@freebsd.org
Subject: Re: Intel em (82574L and 82573L) problems: stopping on high network
 and cpu load (Watchdog timeout)
Message-ID: <20150422065833.GA66880@bali>
References: <20150413101626.GA47411@bali> <552BBF48.4090808@sentex.net>
 <20150414055445.GA54779@bali> <552D1DAC.9040104@sentex.net>
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On Tue, 14-Apr-2015 at 10:01:16 -0400, Mike Tancsa wrote:
> On 4/14/2015 1:54 AM, Andre Albsmeier wrote:
> >
> > Is this an em specific issue or should one avoid TSO generally
> > at the moment? That is, should I disable it on machines with
> > msk (and maybe other) interfaces as well?
> 
> em specific I think.  This thread has some info on what might be going on
> 
> https://lists.freebsd.org/pipermail/freebsd-stable/2014-September/080081.html

For the records: I can definitely say that the problem did
not appear again since I disabled TSO on the em adapters.
I've left it enabled on the msk adapters, so this is indeed
an em-only problem (at least here).

TSO should be disabled in the em driver until fixed.

Thanks again for the hint.

	-Andre