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Date:      Tue, 22 Aug 2006 09:53:22 +0200
From:      "Patrick M. Hausen" <hausen@punkt.de>
To:        Pyun YongHyeon <pyunyh@gmail.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: ICH7 SATA and em interrupt sharing
Message-ID:  <20060822075322.GC72101@hugo10.ka.punkt.de>
In-Reply-To: <20060822015047.GA12848@cdnetworks.co.kr>
References:  <20060821120052.0B25816A526@hub.freebsd.org> <200608211414.16731.matt@chronos.org.uk> <20060821132743.GC45736@hugo10.ka.punkt.de> <44E9B7C1.9010708@goodforbusiness.co.uk> <20060821142613.GI45736@hugo10.ka.punkt.de> <44E9C5B3.90604@goodforbusiness.co.uk> <20060821145328.GL45736@hugo10.ka.punkt.de> <20060821150744.GN45736@hugo10.ka.punkt.de> <20060821195202.GA57333@hugo10.ka.punkt.de> <20060822015047.GA12848@cdnetworks.co.kr>

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Hi!

On Tue, Aug 22, 2006 at 10:50:47AM +0900, Pyun YongHyeon wrote:

>  > em0: Missing Tx completion interrupt!
> 
> Thanks for the testing.
> The above message means the patch really worked. Otherwise you
> would have seen (false) watchdog errors on your system.
> I guess the two possible cause of missing Tx completion interrupts
> comes from a chipset bug or Tx interrupt moderation mechanism. If
> Tx interrupt moderation mechanism is the cause of false watchdog
> triggering we should have to fix all device drivers that have Tx
> interrupt moderation capability. I'll have to check archives for
> bge(4). I'll commit the em(4) patch soon.
> 
> What you see in ssh session and lack of response for ICMP echo
> request indicates other issues. I can't sure but it may not related
> with network drivers at all(eg. sharing interrupt with other devices).

Well, if I disable the em onboard interfaces and use the
onboard fxp interface instead, everything runs smoothely.

Looks like I will use this workaround for now.
Etherexpress 100 cards in bulk quantities are cheap, so I
can even insert a second NIC into the system.

Regards,
Patrick
-- 
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