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Date:	Thu, 2 Feb 2012 12:45:29 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Nick Bowler <nbowler@...iptictech.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Sudden kernel panic with skge in 3.3-rc2

On Thu, 2 Feb 2012 14:21:15 -0500
Nick Bowler <nbowler@...iptictech.com> wrote:

> Hi,
> 
> I just saw this panic on 3.3-rc2 with skge.  I don't know whether it's
> reproducible yet -- the machine crashed while I was not actively using
> it.  We've had this type of card for a few years and I've never seen this
> before so it may be a regression, but admittedly we don't use them all
> that often.
> 
> At the time of the crash, the network interface in question was up, but
> not configured with any addresses; mtu configured to (the default) 1500
> bytes.  It was used for packet capture (tcpdump) shortly beforehand,
> although this was not running at the time of the crash.  It's a PCI
> gigabit ethernet card:
> 
>   03:01.0 Ethernet controller: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11) (rev 11)
> 
> In case it matters, the primary network interface of the system is an
> onboard device using the sky2 driver:
> 
>   02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8057 PCI-E Gigabit Ethernet Controller (rev 10Ethernet controller: Marvell Technology Group Ltd. 88E8057 PCI-E Gigabit Ethernet Controller (rev 10)
> 
> I took a photo of the screen, but unfortuately the top few lines are
> lost forever.  Posted at imgur because it seems a bit big for the
> mailing lists: <http://i.imgur.com/xklGU.jpg>. Apologies for the
> terrible quality; the best camera I could find around was in someone's
> mobile phone.  I'll see about configuring a serial console in case it
> crashes again.
> 
> For convenience (hopefully), here's the call trace retyped in plain text
> (addresses elided, see photo for them).  The full code line is
> reproduced by hand because it's almost unreadable in the photo (and
> truncated to boot).
> 
>   Call Trace:
>    <IRQ>
>    [...] net_rx_action+0xaa/0x1c0
>    [...] __do_softirq+0x7e/0x125
>    [...] ? _raw_spin_unlock+0x26/0x31
>    [...] call_softirq+0x1c/0x30
>    [...] do_softirq+0x33/0x68
>    [...] irq_exit+0x3f/0xb9
>    [...] do_IRQ+0x97/0xae
>    [...] common_interrupt+0x6b/0x6b
>    <EOI>
>    [...] ? hrtimer_start+0x13/0x15
>    [...] ? mwait_idle+0x6e/0x80
>    [...] ? mwait_idle+0x61/0x80
>    [...] cpu_idle+0x61/0xbd
>    [...] rest_init+0x8d/0x91
>    [...] start_kernel+0x338/0x343
>    [...] x86_64_start_reservations+0xb8/0xbd
>    [...] x86_64_start_kernel+0xed/0xf4
>   Code: 48 8b 40 30 48 85 c0 74 0a b9 02 00 00 00 4c 89 fa ff d0 49 8b 86 d0 00 00 00 49 8b 4d b4 48 89 c7 48 8b b2 d0 00 00 00 <f3> a4 31 ff 48 8b 03 49 8b 75 18 48 8b 40 08 48 85 c0 74 13 48
>   RIP  [...] skge_poll+0x367/0x5cd [skge]
> 
> Let me know if you need any more info,

Try reverting this commit, it seems problematic
commit d0249e44432aa0ffcf710b64449b8eaa3722547e
Author: stephen hemminger <shemminger@...tta.com>
Date:   Thu Jan 19 14:37:18 2012 +0000

    skge: check for PCI dma mapping errors

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