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From: Jeff Garzik <>
To: Marin Mitov <>
Subject: Re: net: tx timeouts with skge, 8139too, dmfe drivers/NICs
Date: Mon, 25 Feb 2008 15:53:01 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Marin Mitov wrote:
> Hi all,
> I experience very rare freezes at heavy outbound traffic 
> (sending ~4GB DVD image to another host(s) on the same LAN) 
> using skge driver (NIC on the mobo) as well as (recently tested)
> using rtl8139 or dmfe NICs on the PCI bus. There is a single 
> switch between them (tested with another one just to exclude
> a faulty switch).
> skge <--> Marvell 88E8001 chip
> 8139too <--> Realtek 8136B chip
> dmfe <--> Davicom DM9102 chip
> Symptoms are similar: tx timeouts and no more net activity.
> KDE desktop works, computational programs - work, the machine 
> is usable, but cannot ping, nor can be ping-ed anymore.
> rmmod && modprobe the respective modules repairs the problem.
> Simple surfing/e-mailing from it do not trigger the problem.
> The machine is used as LTSP server for old PCs (as X terminals)
> (mostly outbound traffic) and is not usable as such due to this
> problem.
> The kernel is (PREEMPT or not - NO difference).
> As far as this happens with 3 different NICs/drivers could it be
> a problem in the (common for all of them) networking subsystem?

A TX timeout (like hardware timeouts, in general) is a very generic 
behavior, with many causes.

In general, when you see timeouts with varied hardware and drivers, 
you're almost always dealing with a problem with interrupt delivery, or 
a generic system problem, rather than bugs in the network stack or all 
three drivers.


  reply	other threads:[~2008-02-25 20:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-25 20:37 Marin Mitov
2008-02-25 20:53 ` Jeff Garzik [this message]
2008-02-25 21:36   ` Marin Mitov
2008-02-25 21:42     ` Stephen Hemminger
2008-02-25 22:09       ` Marin Mitov
2008-02-25 22:57         ` Stephen Hemminger
2008-03-12 11:41   ` Marin Mitov

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